Editing Riku

{{game|KH1|FM1|COM|REC|KH2|FM2|KHC|RCO|358|BBS|FMB|DDD|FA}}
{{suite|Riku}}
{{Enemy
 |name=Riku
 |image=[[File:Riku KHII.png|350x400px]]
 |katakana=リク
 |romaji=Riku
 |de=Riku
 |es=Riku
 |fr=Riku
 |pt=Riku
 |type=Entelechy
 |charworld1=Destiny Islands
 |charworld2=Hollow Bastion
 |enva=David Gallagher
 |enva2=Ty Panitz
 |enva2n=(Young Riku)
 |java=Mamoru Miyano
 |java2=Eiji Shima
 |java2n=(Young Riku)
 |game1=Kingdom Hearts
 |game2=Kingdom Hearts: Chain of Memories
 |game3=Kingdom Hearts II
 |game4=Kingdom Hearts 358/2 Days
 |game5=Kingdom Hearts Birth by Sleep
 |game6=Kingdom Hearts coded
 |game7=Kingdom Hearts 3D: Dream Drop Distance
 |KH2normalname=Riku
 |KH2normalfile=Riku KHII.ogg
 |358normalname=Riku
 |358normalfile=Riku KHD.ogg
 |CODnormalname=Riku
 |CODnormalfile=Riku KHREC.ogg
 |s1=Riku-Ansem
 |s2=Ansem, Seeker of Darkness
 |s3=Riku Replica
 |s4=Data-Riku
 |journalKH='''First entry'''<br>Islander. A self-confident youth always competing with Sora. He hated the monotony of island life and built a raft with Sora and Kairi to explore the outside world. Riku seems to have vanished along with the Destiny Islands.<br><br>'''Second entry'''<br>Islander. A self-confident youth always competing with Sora. When the Destiny Islands vanished, so did he. By the time Riku reappeared, Sora had already found new friends, so Riku didn't rejoin him. Riku is willing to go to any length to save Kairi--even join forces with Maleficent.<br><br>'''Third entry'''<br>Riku gained immense power through the forces of darkness. But ordinary humans are no match for the darkness, and it is gradually consuming his heart.<br><br>'''Fourth entry'''<br>When Kairi lost her heart, Riku allied himself with Maleficent to save her. Riku was actually the rightful master of the Keyblade, but once he chose darkness over light, the weapon chose Sora instead. Ansem exploited Riku's weakness of heart and possessed him.
 |journalSS=Sora's childhood friend.<br><br>Baited by the darkness and used by Maleficent and Ansem, Riku once fought against Sora.<br><br>In order to seal the door to darkness, Riku stayed with the king on the other side. His current whereabouts are unknown.<br><br>Sora journeys in the hopes of finding Riku.
 |journalRR=A boy who was born and raised on a small group of islands.<br><br>Riku dreamt of seeing other worlds, and so he forsook the islands—only to be seduced by the power of darkness.<br><br>Enslaved by Ansem, pursuer of darkness, Riku clashed with his childhood friend Sora. But in the end, he was able to regain himself, and together with Sora closed the door to darkness. Still, the dark wounds in Riku's heart have yet to mend.
 |journalKH2='''Ansem'''<br>Mysterious wielder of darkness.<br><br>What could his true purpose be?<br><br>'''First entry'''<br>The form Sora's longtime friend Riku chose.<br><br>Though Xehanort tried to control Riku from within, Riku's heart proved stronger. But the only way to wield the darkness fully was to become it.<br><br>Riku began calling himself "Ansem," perhaps as a sign of resolve. He would live in darkness if that's what it took to wake Sora.<br><br>'''Second entry'''<br>Sora's longtime friend. He had clad himself in darkness in order to wield it, and had even changed in appearance.<br><br>But when the real Ansem's Kingdom Hearts Encoder exploded, Riku returned to his old form.<br><br>You could say it was a miracle—worked by a heart no darkness could eclipse.
 |journalBBS=A little boy who yearns to see the outside world. Terra chose him to inherit the power of the Keyblade.<br><br>Riku deeply cares for his friend Sora, and believes the strength he needs to protect people awaits him somewhere in the wider world.
 |journalCOD=Sora's best friend. They grew up together on the Destiny Islands. But Riku was so desperate to leave their small, stifling home that he succumbed to the darkness. Eventually, he and Sora clashed.<br><br>Fortunately, he met Mickey. With his new friend's help, Riku learned to turns his wrongs into rights, and eventually became one of Sora's greatest, unseen allies.
 |journalDDD=A boy who wields a Keyblade. His battles to save the worlds have often pitted him against the darkness in his own heart.<br><br>Now, he is braving the Mark of Mastery examination to find out if he is still worthy of the Keyblade.
}}
{{Q|Once we step through, we might not be able to come back. We may never see our parents again. There's no turning back. But this may be our only chance. We can't let fear stop us! I'm not afraid of the darkness!|Riku}}
'''Riku''' is one of the main characters in the ''[[Kingdom Hearts (series)|Kingdom Hearts]]'' series. Riku lives on [[Destiny Islands]]. He is the best friend of [[Sora]] and [[Kairi]]. Riku is five-years-old during ''Kingdom Hearts Birth by Sleep'', fifteen during the events of ''Kingdom Hearts'' and ''Kingdom Hearts: Chain of Memories'', and sixteen during the events of ''Kingdom Hearts 358/2 Days'' and ''Kingdom Hearts II''. Riku's name is derived from the Japanese word for "Land".

==Story==
===''Kingdom Hearts Birth by Sleep''===
[[File:Legacy 01 KHBBS.png|thumb|left|Riku is chosen as Terra's successor.]]
When [[Terra]] visits Destiny Islands, he can already sense Riku's potential, and asks why Riku wants to leave his island. Riku tells Terra that [[Master Xehanort|someone]] else left the island long ago, and visited other worlds. Riku states that he would like to leave his world too in order to become strong enough to protect his friends and everything he holds dear. During their conversation, Terra sees a vision of a white-haired man who then transforms into Riku's sixteen-year-old self. This convinces him to choose Riku as his successor, and lets Riku hold his Keyblade to test his strength. He convinces Riku to keep their conversation a secret to preserve the world order.

He and Sora later encounter [[Aqua]], who finds their friendship similar to that of hers and Terra's and Ven's, and asks Sora to protect Riku if he ever loses his path.

Some time afterwards, Riku and Sora are resting on a beach under a starry night. When they are ready to go home, Riku sees Sora's sudden look of sadness and says that perhaps someone from another world is feeling sad somewhere and suggests that Sora try and reach out to him. After Sora reaches out to [[Ventus|Ven]], they both look up at the starry sky.

===Between ''Kingdom Hearts Birth by Sleep'' and ''Kingdom Hearts''===
One night, there is a meteor shower and [[Kairi|a mysterious girl]] appears on the islands from another, [[Radiant Garden|far off world]]. Riku, Sora, and Kairi quickly forge a powerful friendship. Soon after Kairi's arrival, Riku and Sora go to the secret place, a small cave that they frequently explored. While there, the two spot a mysterious door, though neither one can find a way to open it. The two decide to leave, but Riku manages to get a glimpse of Destiny Islands' Keyhole.

===''Kingdom Hearts''===
[[File:Paopu Fruit 01 KH.png|thumb|right|Riku with Sora and Kairi.]]
Riku, Sora, and Kairi live on the Destiny Islands. The three construct a raft and gather supplies so that they can set out and search for other worlds. He and Sora continue their rivalry, and Riku takes jabs at Sora over their relationship with Kairi, telling him that if Sora does not share a [[paopu fruit]] with Kairi soon, he will.

On the night before their journey. Riku opens the door in the secret place and the [[Heartless]] invade the islands. Kairi and Sora each set out for the island to make sure their raft is safe. Sora finds Riku, but finds that Riku is only eager to escape the islands. Darkness surrounds the two, and Riku disappears into it, while Sora gains the [[Keyblade]].

Riku eventually ends up in [[Hollow Bastion]] via the [[Corridor of Darkness]], separated from his friends. There, he is found by [[Maleficent]], and she offers him shelter and protection.

In exchange for Riku's cooperation in gathering the [[Princesses of Heart]], she agrees to find Kairi and bring it to him. During this time, Riku comes to possess a blade called [[Soul Eater]]. Riku comes across Sora in [[Traverse Town]]. He takes possession of Sora's Keyblade for a few moments before giving it back to Sora, much to Sora's surprise, and then he suddenly leaves. Watching Sora from a distance, Maleficent turns Riku against Sora, telling him that Sora has abandoned him and Kairi for traveling with [[Donald Duck]] and [[Goofy]].  However, he is still highly suspicious of her motives.

During Sora and Aladdin's fight with Jafar in [[Agrabah]], Riku takes [[Jasmine]] to Hollow Bastion under Maleficent's orders. Maleficent reveals the whereabouts of Kairi's body. She claims that the only way to save Kairi, who appears to have lost her heart to the darkness, is to gain access to [[Kingdom Hearts]].

[[File:Unfinished Business 01 KH.png|thumb|left|Riku kidnapping Pinocchio.]]
Riku meets Sora again in [[Monstro]], intending to use [[Pinocchio]] to help him find a way to save Kairi's heart. However, Pinocchio is captured by the [[Parasite Cage]], and Riku works together with Sora, Donald, and Goofy to save him. Afterwards, Riku kidnaps Pinocchio, and is pursued by Sora, Donald, and Goofy into Monstro's stomach. Riku asks Sora to join him and help him rescue Kairi, but Sora refuses, knowing that Riku's methods are wrong. When the Parasite Cage returns, Riku vanishes into a Corridor of Darkness.

Maleficent bestows the power of darkness on Riku, giving him the power to command the Heartless. He then goes to [[Neverland]], traveling on [[Captain Hook]]'s ship, where Kairi's body is being kept. He appears before Sora, showing him Kairi's body. Sora warns Riku that the Heartless will eventually turn on him and devour his heart, but Riku refuses to listen and retreats after using his new powers to summon [[AntiSora]]. However, before he heads back to Hollow Bastion, he tells Captain Hook that the captured [[Wendy]] is not a Princess of Heart. Riku takes Kairi and recklessly returns to Maleficent's castle via the Corridors of Darkness without a vessel, putting a strain on his heart. While he is drained from the trip, Maleficent unlocks the last of Riku's dark power.

At Hollow Bastion, Sora again meets Riku, stopping him from taking down the wounded [[Beast]]. Riku then forcibly summons the Keyblade away from Sora, telling him that he was "just the delivery boy" and that Riku is the true Keyblade master. After leaving Sora with the toy sword he used on Destiny Islands, he departs, and Donald and Goofy reluctantly follow him as per [[Mickey Mouse|The King]]'s orders.

Sora makes his way to the foyer of the castle, with the help of Beast. Riku, taking on a new appearance with the increasing strength of his dark powers, tells him to quit, but Sora refuses to leave without Kairi. Riku, intending to prove to Sora that he is the strongest of the two, attacks his old friend, but Donald and Goofy go to Sora's aid, finding themselves unable to betray Sora after all that they had been through together. With the strength of his friends, Sora reclaims the Keyblade, and drives Riku to fight him.

Riku, defeated, manages to escape, but he is confused as to why Sora was able to regain the Keyblade. A [[Ansem, Seeker of Darkness|cloaked figure]] appears to him from the Darkness, telling him that only one with a stronger heart can claim the Keyblade, and Riku's was weaker than Sora. However, the figure tells him that plunging himself into darkness will make his heart stronger. Riku does so, and his is possessed by the dark figure.

[[File:Kairi's Heart Within Sora 01 KH.png|thumb|right|Ansem possessing Riku's body.]]
The possessed Riku then comes before Maleficent, and warns her of the dangers of unlocking the [[Final Keyhole]]. When she claims not to be afraid, Riku shows a new, [[Keyblade of People's Hearts|dark Keyblade]] created with six of the seven princesses' hearts. However, it doesn't react to the Keyhole. Realizing it is still needing Kairi's heart to be complete, Maleficent heads off to handle Sora and company. After Maleficent is defeated by Sora, Riku appears with his Keyblade and explains that unlike Sora's Keyblade, this Keyblade possesses the ability to unlock a person's heart, and Riku demonstrates this by piercing Maleficent's chest, allowing the immense darkness that is attracted to her to overtake her heart, transforming her into a giant dragon. When Maleficent is defeated again, he reappears, commenting on how Maleficent was being used by the Heartless before disappearing again.

[[Game:Riku|Riku]], declaring himself to be Ansem, the Seeker of Darkness, confronts Sora in the Grand Hall and reveals that Sora has Kairi's heart in his body. While Donald and Goofy look on, Riku and Sora clash again, with Ansem's presence amplifying Riku's dark powers. He fades away when he is defeated, but after Sora impales himself with the Keyblade to release Kairi's heart and disappears, Ansem reveals himself and attacks Kairi, Donald, and Goofy. Riku uses the last of his strength to hold back his possessor, and yells to the others to run. After they leave, Riku and Ansem are pulled into the darkness coming from the Final Keyhole.

[[File:Kingdom Hearts is Light 05 KH.png|thumb|left|Riku standing behind the Door to Darkness.]]
A newly restored Sora, along with Donald and Goofy, eventually make their way to the [[End of the World]]. There, in the remnants of Destiny Islands, they once again confront Ansem, who has full control of Riku, and defeat him after a series of battles at the [[Door to Darkness]].

Riku is restored after Ansem's defeat, and he appears on the other side of the Door to Darkness, aiding Sora in closing it, although unable to cross it himself. Waiting to enter the [[Realm of Light]] are thousands upon thousands of Heartless, which only causes further problems for the two friends. However, [[Mickey Mouse|King Mickey]] wards them off with his [[Kingdom Key D|Keyblade]]. The King and Sora then proceed to close and lock the door from either side, and Riku is stuck in the Realm of Darkness with the King, but not before he tells Sora to take care of Kairi.
{{-}}

===''Kingdom Hearts: Chain of Memories''===
{{Q|Neither suits me. I'm taking the middle road."<br>"Do you mean the twilight road to nightfall?"<br>"No. It's the road to dawn.|Riku and DiZ}}
[[File:Ansem of the Dark 01 KHRECOM.png|thumb|right|Riku fighting Ansem.]]
Riku awakes in the lowest basement of [[Castle Oblivion]], being led there by his heart resonating with Sora, who also happens to be in Castle Oblivion, though on the ground floor. A dark card and [[Ansem the Wise|a disembodied voice]] present themselves. The Voice offers Riku the chance to sleep and forget his troubles as well as the light, or take the card and take the first steps toward the truth. Riku takes the card confidently stating that "This looks like a boring place to take a nap anyway."

Riku arrives in none other than Hollow Bastion, though only a version of it crafted from his memories. However, though Hollow Bastion is the same as he remembered it, he is unable to find anyone. All the while he searches, the voice speaks to and mocks the young teenager.

At long last, Riku meets someone: Maleficent. Maleficent taunts him and his refusal of the darkness, but Riku fights and defeats her, hoping to prove that he is above the darkness.

Riku leaves Hollow Bastion, only to see the true form of Castle Oblivion. The voice again comes to Riku, but this time reveals himself to be Ansem, who wants to take over Riku again. However, though Ansem is powerful, King Mickey comes to aid Riku with his light. Riku then manages to fend off Ansem for the time being. But before he leaves, the Heartless leaves Riku with some world cards and the ability to wield his inner darkness as a weapon.

Riku soon realizes that he has the power to detect the "smell" of darkness, and is discouraged by it, though King Mickey comforts him. However, King Mickey can only appear to Riku as a projection, for he is still in the Realm of Darkness. Still, with King Mickey's encouragement, Riku ascends the basements of Castle Oblivion in order to rid himself of his darkness. Meanwhile, as Riku travels through the lower levels of Castle Oblivion, Sora ascends the upper floors, being manipulated by [[Marluxia]], a member of the mysterious [[Organization XIII]] and the lord of Castle Oblivion. But three other Organization members, [[Vexen]], [[Lexaeus]], and [[Zexion]] work to counter Marluxia by using the dark-wielding Riku against the light-wielding Sora.

To further the trio's goals, Vexen independently appears before Riku and the latter wonders if Vexen is with "Ansem" (Xehanort's Heartless). Vexen cryptically responds that he is with "[[Xemnas|another Ansem]]". Still, Riku fights against Vexen, seeing him as an enemy. However, the battle only helps Vexen, who uses the data he gathered from the battle to create a [[Riku Replica|replica of Riku]]. The replica soon comes to battle Riku, mocking Riku's fear of the darkness while the replica embraces it. However, the real Riku proves victorious, and the replica runs off.

Soon, Ansem, Seeker of Darkness, appears again, saying that the replica is a model of what Riku should be. But Riku only reaffirms his desire to conquer his darkness.

Passing through much of the castle (by this time, the bulk of Sora's adventure is complete, and [[Larxene]] and Vexen have been eliminated) Riku finds Lexaeus. Lexaeus, like the others, tells him that he should accept the darkness again, because if he doesn't, his journey will end here. The two fight, and Riku only manages to wear him down. As Riku moves in for the finishing blow, Lexaeus summons his herculean strength and knocks Riku unconscious with his Axe Sword. Lexaeus decides to eliminate him since taking him down was too much trouble, but as he does, he notices Riku becoming possessed by Ansem, Seeker of Darkness. This catches Lexaeus off-guard, and the possessed Riku takes the opportunity to put an end him. Although Lexaeus is defeated, Riku ends up having a struggle with Ansem that he nearly loses. Just before the dark being can overwhelm Riku, Mickey saves him again and manages to bring him out of the darkness.

Riku comes closer to the ground level, just as Marluxia's scheme fails and Sora finishes him off. Riku senses Marluxia's defeat, and Zexion quickly arrives on the scene to explain it. But he also reveals that Sora is the one who did the deed, much to Riku's surprise. Zexion quickly asks if Riku is capable of seeing Sora, for Riku shouldered the darkness for so long, and Ansem still resides in his heart. Riku tries to resist Zexion's comments, but Zexion ultimately gives him a world card of Destiny Islands.

In Destiny Islands, Riku meets all of his friends, but they are all silent and they eventually disappear, even Kairi. Zexion throws all of Riku's fears at him at once, telling him he's responsible for causing them to disappear, and that he belongs to the darkness now. He finally transforms an illusion of him into a Darkside Heartless, telling him this is what he has become. Riku defeats the Heartless as Zexion disguises himself as Sora. He tells him that it's finally time to face the light.

[[File:The Last One-on-One 01 KHRECOM.png|thumb|left|Riku and Riku Replica in Twilight Town.]]
Riku sinks into the light as he begins to fade, but [[Naminé]] appears in the form of Kairi and tells him that he can't fade, because light can't destroy him, and neither can darkness, so he should accept both to drive away his fears. He awakens his dark powers again, admitting that it's a part of him and not evil, defeating Zexion. Zexion disappears, but is quickly eliminated by the Riku Replica with Axel.

Riku nearly makes it to the main floor as Ansem, Seeker of Darkness, appears to control him, but King Mickey defends Riku again and finally appears for real. Riku is relieved at finally having a real friend with him. King Mickey explains that he found a card which showed him Riku's heart and he followed it back to him. Riku uses the card, and ends up in [[Twilight Town]]. Ansem, Seeker of Darkness, appears again, but Riku tells him that he's not "Ansem", because his scent is not darkness—but rather something else. Riku also sees that this man is the voice that presented itself at the beginning of his journey. The voice finally appears and introduces himself as [[Ansem the Wise|DiZ]]. Riku asks him what he really wants from him, and DiZ tells him he wants him to choose between Light and Darkness, because he lies in-between. The decision will be decided with Naminé, whom Riku looks for.

However, the Riku Replica manages to find him, and demands another fight to prove him "worthy". The replica intends to destroy Riku in order to become real, but fails. However, Riku comforts him by saying that the replica's heart will go to the same place as the real one's, before the replica vanishes out of existence.

[[File:Riku's Choice 01 KHRECOM.png|thumb|right|Riku and Naminé talking in front of the memory pod where Sora slept.]]
Riku meets up with Naminé, who is with Sora in his memory pod, and explains the situation. She offers to seal away Ansem and Riku's darkness, so that he may forget them, but will have to sleep to do so. Riku refuses, hoping to win on his own, and leaves a satisfied Naminé. However, before he departs, he tells Naminé that he knows that it was she who appeared to him as Kairi, commenting that they smell the same.

After meeting Naminé, DiZ appears again to Riku and the King (who notes that DiZ seems familiar). Knowing his choice, DiZ gives Riku a card that will draw out Ansem, Seeker of Darkness. After DiZ leaves, Riku tells King Mickey to destroy him if he fails to stop Ansem, but the King refuses, saying he'll only help him regain control, and never harm him. Riku concedes.

Riku faces Ansem alone for one final battle. Ansem asks why he still refuses him if he accepts darkness now, and inquires if Riku is still scared of the darkness. Riku denies this and merely says, "I just can't stand your foul stench." They fight and the last of Ansem is destroyed, but not before he says a part of him is still in Riku, and that he shall return.

Riku and Mickey wait at the crossroads. Riku tells him that he can't go home yet, as "Ansem's" shadow still lingers in him, but Mickey says the darkness is a part of him. Darkness is not all bad, because Riku has chosen a road he never thought of before, one of both Light and Darkness. Riku, who now forms an equally strong bond to the King as Sora's friendship to Donald and Goofy, calls Mickey by his name at the King's request.

[[File:Where the Road Leads 01 KHRECOM.png|thumb|left|Riku walking the road to dawn.]]
They leave, taking Organization coats that DiZ gave them prior to confronting Ansem, and DiZ appears for one final question: if he shall take the "road to light" or the "road to darkness". Riku chooses neither; he instead chooses to take the middle road, "The road to dawn". Riku and King Mickey eventually make it out of the plains and separate after Riku realized he couldn't completely rid himself of the darkness festering in him. Deciding to return to DiZ and offer his help, Riku dons a blindfold, so that "his eyes couldn't lie" about the darkness that he is preparing to use.
{{-}}

===''Kingdom Hearts 358/2 Days''===
{{Q|You could say I am...the biggest nobody of them all.|Riku to Xion}}
[[File:Xion's Defeat 01 KHD.png|thumb|right|Xion defeated by Riku.]]
Sometime after these events, Riku encounters [[Xion]] on the bridge in [[Beast's Castle]]. As she lies defeated, Riku pulls off her hood and pulls up his blindfold to get a good look at her. He is shocked by her appearance. 
{{canon}}
In the [[Kingdom Hearts Series (manga)#Kingdom Hearts 358/2 Days (manga)|manga]], Xion takes Kairi's appearance when Riku looks at her face.
{{canonend}} 
Riku asks who she is and why she can wield a Keyblade. Xion replies by asking why he's dressed like someone of Organization XIII, to which he responds by saying that he wants to make sure that his best friend sleeps in peace. He then calls Xion's Keyblade a worthless sham. Angered, Xion demands what right he had to say such a thing and attacks him, only to be knocked down single-handedly. Riku then tells her to "find a new crowd." It can also be inferred that Riku still can't forgive himself for stepping into darkness when he then told Xion, "You could say that I am, the biggest nobody of them all."

Xion soon leaves the Organization, and she finds Riku again. He takes her to [[Destiny Islands]], and at one point, she has a nightmare.

[[File:Snarl of Memories 01 KHD.png|thumb|left|Xion turns into a young Riku during her nightmare at Destiny Islands.]]
While cradling Xion in his arms during her nightmare, Riku recalls his conversation with Naminé in the white room about Xion, discussing what has to be done for Sora to wake up. In addition to being with Xion during her nightmare, he is also in her nightmare alongside Zexion. Xion collapses in pain while hearing the hurtful speech Zexion gave Riku while in Castle Oblivion. She then turns into Roxas, Riku, and finally Sora. After Xion wakes up on Destiny Islands, she expresses her curiosity about Sora and "that girl he's always with", in which Riku tells her that Kairi is someone very special to Sora. He tells her that she is the reason Sora is unable to wake up; as part of his memories are inside of her. Even though Xion is unsure of where she truly belongs and what the right choice is, Riku gives her some time to think about it, and decide what is best for everyone. 

After some time, the two leave to stay in [[Castle Oblivion]]. As [[Roxas]] and [[Axel]] continue to search for her around the worlds, they finally make contact in [[Twilight Town]]. Xion quickly takes her leave and Riku stays behind to distract them.

Riku later converses with DiZ next to the pod Sora sleeps in; DiZ tells Riku that it is time for him to act. He soon meets with King Mickey in the forest outside the [[Old Mansion]], where he is in his Ansem form. The King then summons his Keyblade, ready to fight, not knowing it is Riku whom he sees. To let the King know it's him, Riku puts his blindfold on, which makes him return to normal, surprising the King. He informs Mickey that he will be fighting an Organization member soon, and may not survive, forcing the King to promise to protect Sora.

Sure enough, Riku sees Roxas in [[The World That Never Was]] as the latter attempts to free Kingdom Hearts. After he fights several [[Neoshadow]]s, Roxas finally spots Riku and pursues him. Riku grabs Roxas's [[Oblivion]] Keyblade after a failed attack as he falls down from Memory's Skyscraper. As Riku falls, his memories of Xion flash through his head, becoming increasingly blurry. Riku lands, and Roxas drops down after him.

[[File:The Beginning of Everything 01 KHIIFM.png|thumb|right|Riku transforms into Ansem.]]
Roxas reveals to Riku his goal of freeing Kingdom Hearts as Xion asked him to, so that he, Xion, and Axel could return to being friends. Riku responds by telling Roxas it won't be long before his memory of Xion completely fades. Angered, Roxas fights Riku and gains the upper hand; however, Riku fights back and knocks Roxas unconscious. Roxas quickly comes to, and grabs back Oblivion. Riku then says, "Come on Sora, I thought you were stronger than that." Roxas naturally responds, quipping, "Get real! Look which one of us is winning!", but is immediately shocked by his own words. Riku confirms this as proof of Roxas's status as Sora's Nobody; angry, Roxas pulls out both Keyblades, shouts "I am me. Nobody else!", and knocks Riku back. Xion quickly tells Riku in his mind, "Riku, please! You have to stop him!" Left with no other choice, Riku realizes if he is to win in the Realm of Darkness, he must submerse himself in the same darkness. He removes his blindfold, taking the form of Ansem, Seeker of Darkness. He quickly dispatches Roxas, and returns him to DiZ's base underneath the abandoned mansion in Twilight Town, introducing himself as "Ansem".

===''Kingdom Hearts II''===
[[File:His Name is Ansem 01 KHII.png|thumb|left|Riku introduces himself as Ansem.]]
Riku continues to ally himself with DiZ, as they have a common goal: to help Sora awaken (though Riku finds his memories of Sora fading, being a side-effect of Naminé's toying with Sora's memories). Roxas's memory is erased by DiZ and he is placed into a [[Simulated Twilight Town]], to live out his days until the time comes for him to meet Sora. Meanwhile, Riku watches over Roxas, periodically entering the town in order to keep Roxas ignorant to the truth, including keeping Naminé from saying anything important to Roxas. He also takes some keepsakes of Roxas's during some of his visits. With all these deeds done, Riku finally demands to know what DiZ's true objective is. Upon hearing that it is merely revenge (DiZ does not disclose against whom it is), Riku clenches his fist, shocked and disgusted at how DiZ is merely using him and Sora for his own selfish reasons.

Eventually, when the time comes for Roxas, Riku makes sure to prevent the Nobodies from flooding the town. Soon, the goal Riku had been searching for is finally reached: Roxas joins with Sora. Though DiZ orders him to eliminate Naminé, Riku desires no part in DiZ's prejudice revenge and hands her to the now-renegade [[Axel]] of Organization XIII before leaving DiZ.

Riku, after Roxas joins with Sora, comes into contact with King Mickey. Riku begs King Mickey not to reveal his whereabouts and condition to Sora, and the King reluctantly agrees. He then leaves the King the digital versions of Olette's [[Munny#Story|Munny Pouch]] and Roxas's crystal orb that he had pilfered from Roxas earlier.

Later, Axel tries to kidnap Kairi in an attempt to use her to turn Sora into a Heartless so Roxas would be reborn. However, Riku rescues Kairi by opening a Corridor of Darkness, and takes her to Twilight Town, where she meets [[Hayner]], [[Pence]], and [[Olette]], but never reveals his identity. However, Axel again appears and kidnaps Kairi, but another member of Organization XIII, [[Saïx]], manages to take Kairi away from Axel, with the intent to use her to fuel Sora's rage. At [[Battle of the 1000 Heartless|the battle for Hollow Bastion]], Sora, Donald, and Goofy end up in an empty realm, where Riku arrives. He says nothing to them, and only leaves the trio a box that contains [[sea-salt ice cream]] and a picture of Roxas, Hayner, Pence, and Olette in front of the haunted mansion before immediately departing.

[[File:The Man Who Stands on the Snowy Mountain 01 KHII.png|thumb|right|Hooded Riku with Soul Eater.]]
Riku also arrives at the [[Land of Dragons]], trying to warn the Emperor of a Heartless dragon that [[Xigbar]] created. But he ends up meeting Sora, and Sora attacks him, thinking Riku to be an Organization member. However, Sora sees that Riku is wielding the Soul Eater, and begins to suspect Riku's identity. But Riku still goes ahead with his mission, and warns the Emperor (but had to defeat [[Li Shang]] in order to do so). When Sora talks to the Emperor, the wise ruler's description of the man further cemented Sora's idea that the man he fought was Riku; though unaware of why he is wearing the coat, Sora is nonetheless relieved to know that Riku is safe.

Riku later appears in the World That Never Was, after Naminé rescues Kairi. The two are faced against Saїx, but Riku quickly comes to the rescue, his Soul Eater having now transformed into a Keyblade called [[Way to the Dawn]]. To Kairi's surprise, Naminé calls Riku by name, and disappears. Though Riku attempts to depart when Saїx escapes, he is stopped by Kairi and Pluto. Kairi, excited to see Riku, removes his hood, but is met with the face of Ansem, Seeker of Darkness. She takes it in stride, seeing the true Riku underneath his current form.

Kairi later is attacked by Heartless in her attempt to help Sora, and saved by Riku. He then gives Kairi the [[Destiny's Embrace]] Keyblade so that she may fight. After Sora defeats Xigbar, he and Kairi reunite. Riku tries to take his leave, but Kairi stops him. She then reveals Riku's identity, and with some concentration, Sora also sees Riku underneath his dark appearance. The revelation makes Sora overjoyed to the point of tears. Riku explains that he did not want to be found, thanks to his appearance, and confirms Sora's suspicions of the clues they found- namely, the ice cream and Roxas' photo. Still, he and the others make their way up the castle, defeating the remaining Organization members save for [[Xemnas]]. During this time, Riku reveals the truth about Roxas to Sora, and realizes that he never had to fight him; Roxas had left Organization XIII because he had wanted to meet Sora in the first place, and would most likely have met him either way over time.

Near the top, Riku reunites with King Mickey and DiZ, his true name being Ansem the Wise, who is using a machine to try and encode Kingdom Hearts into data. Xemnas also arrives, and he and Ansem the Wise trade bitter words. The machine then explodes, unable to handle Kingdom Hearts, sending Ansem the Wise to the Realm of Darkness while causing countless hearts Xemnas had collected into Kingdom Hearts to rain down on the world, creating a slew of Heartless. The explosion also cleanses Riku's heart and restores Riku to his original form, though he is still remorseful. After some encouragement, Riku transcends the rest of the castle, abandoning his cloak and blindfold. He and the others also encounter Maleficent and [[Pete]], who decide to hold off the hordes of Heartless that are overtaking the castle, but only so that they will eventually take the castle for their own.

[[File:To End Everything 01 KHIIFM.png|thumb|left|Riku and Sora battling Xemnas.]]
Riku and the others then confront Xemnas, refusing his demand to gather more hearts. Xemnas then removes Sora from the area, fighting him one on one, with everyone else calling out to him. When Sora returns, they see that Xemnas has already reached Kingdom Hearts, and disappears into it. A door, constructed by the will of the worlds, appears, and the three wielders of the Keyblade open it up and follow Xemnas. After a tough battle, Naminé appears again, opening up a corridor of darkness that leads to Destiny Islands, as Riku can no longer use them. However, Xemnas attacks, riding on a gigantic robotic dragon, and separates Sora and Riku from the others. After a series of battles, the two of them are drawn into nothingness by Xemnas and face in a final, exhausting battle.

Towards the end after the final attack used by Xemnas, Sora is left open and Riku takes a blow intended to finish off his friend, which allows Sora to finish Xemnas off with both Riku and Sora firing a beam of light from Sora's Keyblade. After the fall of Xemnas, Sora and the injured Riku face an onslaught of Dusks ready to fulfill their master's final order: eliminate the Keyblade wielders. However, the Dusks disintegrate back into nothingness, and Sora and Riku escape the realm, entering the Dark Meridian.

[[File:Ending 04 KHII.png|thumb|right|Riku and King Mickey reunite at Destiny Islands.]]
Having the time to finally talk, the two reconcile with each other. Riku then comes across a letter in a bottle, written by Kairi, and gives it to Sora, believing him to be the proper recipient. Sora then manages to open the Door to Light, as King Mickey predicted, and the two return home, reuniting with their friends. While Sora shares a hug with Donald and Goofy, Riku shares his own moment with King Mickey. Ironically, even though Riku was once jealous of Sora's friendship with Donald and Goofy, he ended up having a similar one with Mickey.
{{-}}

===''[[Kingdom Hearts coded]]''===
[[File:KH Re-Coded - Data-Riku.PNG|thumb|left|150px|Jiminy's Journal taking Riku's form.]]
{{main|Data-Riku}}
A [[Data-Riku|data version of Riku]] is created by the digitization of [[Jiminy's Journal]] and becomes a vessel for the memories contained in the Journal. He appears as Riku does in ''Kingdom Hearts''.

One of the memories hidden in the Journal<!--when is it revealed?--> depicts Riku meeting Ansem on Destiny Islands.

In the Destiny Islands room of the Dataspace's Castle Oblivion, Data-Riku reveals to Sora the memory of Riku on the Clock Tower.
<!--
In one of the memories recovered from the Journal, Ansem, Seeker of Darkness, and Riku encounter each other shortly before Destiny Islands is completely swallowed by the darkness. At the last minute, Ansem opens a portal for Riku, allowing him to escape. move to KH section, storylink to coded

In another memory, revealed to [[Data-Sora]] in the digital version of Castle Oblivion, Riku stands on top of the [[Neverland#Clock Tower|Clock Tower]] with an unconscious Kairi, looking out at the moon. move to KH section, storylink to coded-->

After the Dataspace simulation finishes, King Mickey goes to talk to Yen Sid, who advises him to summon Sora and Riku for a [[Mark of Mastery exam]]. Mickey writes a letter to Sora, Riku, and Kairi, which he sends in a bottle to Destiny Islands.{{storylink|Blank Points}} As they sit on the beach, Sora and Riku watch the waves and comment that Destiny Islands is a small world, but also part of a much bigger one, then jump to discussion about the Door to the Light. Kairi then appears with Mickey's letter, which the trio reads together.{{storylink|Kingdom Hearts II}}

===''[[Blank Points]]''===
After reading Mickey's letter, Sora sits on the Paopu tree while holding it and staring off into the sunset. Riku walks up to him and asks if he has decided, and Sora says that he has. He later smiles at Sora's decision to venture out to find Terra, Aqua and Ven.

===''[[Kingdom Hearts 3D: Dream Drop Distance]]''===
{{spoiler}}
[[File:Mark of Mastery KH3D 01.png|thumb|left|Yen Sid prepares Sora and Riku for their Mark of Mastery exam.]]
Riku accompanies Sora to the [[Mysterious Tower]] in response to a call from [[Yen Sid]] to undertake the [[Mark of Mastery exam]] in order to prepare for the coming return of [[Master Xehanort]]. Once told of the threat Master Xehanort poses, Riku does not hesitate to take the exam, seeing it as an opportunity to see whether or not he is worthy of wielding the Keyblade, especially after his past with the darkness. For their exam, Riku and Sora are sent to the [[Sleeping Worlds]], where they are to awaken several worlds that were restored following the defeat of Ansem but remained in a state of deep sleep.

Riku and Sora's journey starts on Destiny Islands, but they soon move on, and end up in Traverse Town, where Riku ends up separated from Sora but discovers his new attire and abilities. After meeting up with [[Neku Sakuraba]] and his friends, who tutor him, Riku sets off on his journey alone, venturing across several worlds, meeting new friends and battling new villains. But along the way, Riku comes into conflict several times with a mysterious young man with ties to Master Xehanort, accompanied by Ansem himself, who remind Riku of his past experiences with the darkness and try to get him to succumb again, but Riku refuses, reminding Ansem that he walks the road to dawn.

However, once all the seven Keyholes in the Dreaming Realm are sealed, Sora ends up trapped in sleep in The World that Never Was, and Riku rushes to his rescue upon realizing this. He finds Sora in a comatose state inside the Castle, his heart having been damaged by Xemnas and the young man himself. The young man turns out to be an alternate timeline incarnation of Master Xehanort in his youth, who has been traveling to different periods in time to recruit several other incarnations of Xehanort together. Riku attempts to awaken Sora, but the darkness from Sora's nightmare turns into the [[Anti Black Coat]] that engages Riku. Riku manages to defeat the Anti Black Coat and carries on through the castle, eventually coming face to face with Ansem. Ansem attempts to take over Riku's body again, but remembering his secret encounter with Terra, Riku resolves to make his inner darkness his own power for good and make Ansem become part of his light. Then the two battle each other once more. Ultimately, Riku prevails and eventually makes his way to Where Nothing Gathers, where he finds Sora on an Organization XIII throne. Young Xehanort blocks Riku's way, but Mickey comes to Riku's aid by casting a Stopra spell. Young Xehanort, however, is unaffected by the spell and knocks Mickey aside to battle Riku. After a fierce struggle, Riku defeats Young Xehanort. However, the victory is short-lived, as Master Xehanort is finally revived and joined by the rest of his new Organization, among them are Young Xehanort, Ansem, and Xemnas.

Master Xehanort fills Riku and Mickey in on his past attempt to create the [[χ-blade]] by pitting [[Ventus]] and [[Vanitas]] against each other. The plan failed, but he had a backup. Master Xehanort had Young Xehanort create a new Organization XIII made of Master Xehanort himself and twelve vessels to harbor a piece of Master Xehanort's heart in order to create thirteen darkness to battle seven lights and recreate the χ-blade, the twelfth intended vessel was to be Riku but since he built a resistance to darkness, Sora was forced to replace him. Riku and Mickey attempts to save Sora, but are restrained by Ansem and Xemnas. [[Lea]] then arrives and saves Sora from Master Xehanort. Ansem summons his Guardian, who grabs Riku and Mickey, but the Guardian is defeated by Donald and Goofy, who arrive via Mickey's old Star Shard. His plans temporarily derailed, Master Xehanort retreats with his Organization.

Riku brings Sora's comatose body back to the Mysterious Tower and dives into Sora's body to mend his fractured heart. In the process, he is forced to battle Sora himself, enveloped in Ven's Keyblade Armor, which has been corrupted by a Nightmare. Riku defeats Sora and mends his heart, successfully reviving him. After sharing a warm reunion with his friends, Riku is named a Keyblade Master by Yen Sid for his efforts, but is momentarily shocked when Lea summons his own Keyblade and vows to compete with him.

As his first duty as a Keyblade Master, Yen Sid orders Riku to bring Kairi to him to undergo training with her Keyblade in order to counter Master Xehanort's new Organization.
{{spoilerend}}

==Other appearances==
===''[[w:c:finalfantasy:Final Fantasy XIII-2|Final Fantasy XIII-2]]''===
[[File:Lightning reaches to Serah FFXIII-2.png|thumb|right|Lightning beckons Serah to stay.]]
Riku's iconic scene in ''Kingdom Hearts'' where he reaches for Sora to follow him, later echoed by [[Vanitas]] and [[Young Xehanort]], is emulated in a scene in ''Final Fantasy XIII-2''; in a dream version of New Bodhum, Serah finds Lightning on the dock, who beckons for her to stay, saying that her family is waiting. After refusing, Lightning is engulfed in chaos.
{{-}}

==Personality==
{{Q|I've always wondered why we're here on this island. If there are other worlds out there, why did we end up on this one? And... suppose there are other worlds... then that means ours is just a little piece of something much greater.|Riku, to Sora and Kairi}} 
In ''Kingdom Hearts'', Riku is a calm, cool, collected teen who is not afraid to go far beyond his limits. This shows through when he shows no fear in stepping into the dark portal when Destiny Islands was being consumed by darkness, along with his statement "I'm not afraid of the darkness!" Also, he seems to be aware of Sora's romantic feelings toward [[Kairi]] and often teases him for liking their friend, such as when he challenges Sora to a race, Sora saying that if he wins, he gets to become captain of the raft they're constructing; Riku ups the ante by saying that if he wins, he gets to share a paopu fruit with Kairi. However, he reveals that he only made that bet to see the reaction on Sora's face, which shows his awareness of Sora's feelings for Kairi.

He also shows a strong competitive streak, along with a bit of jealousy when he challenges Sora, saying that his heart is stronger than Sora's heart. It is not actually said aloud, but thanks to Maleficent, he became increasingly jealous of Sora, starting with him finding out about Sora's new friends, and his thinking that he had been replaced. The jealousy grew when he learned about Sora possessing the Keyblade, and enventually turned into rage, resulting in the battles against Sora throughout ''Kingdom Hearts'', and his possession by Ansem, Seeker of Darkness. 

Though his traits were not too favorable in ''Kingdom Hearts'', he becomes more heroic in ''Kingdom Hearts: Chain of Memories''. Riku has many realizations. One of these was him realizing that he let his heart become weak. From that moment on, he began to shy away from the darkness in his heart. Through the scores of fights and battles in Castle Oblivion, he makes another big realization: he can't get rid of the darkness in his heart, and decides to use it without turning from the light like before. He matured immensely, and along with leaving his past behind him, he also left a lot of his unfortunate traits.

In ''Kingdom Hearts II'', he shows a great amount of loyalty and care for his friends. To save Sora, he did everything he could to bring Roxas to DiZ to make Sora whole again, going so far as to give up his physical form for that of Ansem. As Sora journeyed on between the worlds, he dropped him some valuable clues, such as the sea-salt ice cream and the picture.

When he finally is found in the World That Never Was, he repeatedly shows regret, telling Sora that "he didn't want to be found," and almost refusing to come back to Destiny Islands because of his wrongdoings.

Ever since he was young, he had been curious with everything that is outside of his world. Over time, his curiosity became obsession and he began to think of his world as a prison surrounded by water. This obsession greatly diminishes throughout the year of Sora's slumber, most likely because he had already seen many other worlds that the curiosity disappeared. When he returns to Destiny Islands in ''Kingdom Hearts II'', he still comments it as a small world, but agrees with Sora's remark that it is only a part of one that's much bigger. This marks that Riku has a better view of his home world than before, when he imagined it as a prison.

Another good personality trait he shows is a strong protectiveness over his friends. He never wanted Sora and Kairi to find out about the time he spent in the darkness. He nearly sacrificed himself to protect Sora from Xemnas' attacks, leaving him injured after the final battle.

Though Riku matures significantly over the course of the series, he still seems to retain some of his old ''Kingdom Hearts'' self, particularly his sense of humor; he refers to Sora, Donald, and Goofy as "wise guys" when talking to the [[the Emperor|Emperor]], cracks a joke about Donald and Goofy's intelligence at their expense ("Sora never did pick the brightest friends."), and calls Sora a "total sap" when going to confront Xemnas.

==Abilities==
{{Main|Game:Riku}}
Like Sora and Roxas, Riku can wield the Keyblade, though he can wield both his own and others since Terra chose Riku to inherit the Keyblade in ''Kingdom Hearts Birth by Sleep''.<ref>'''''[[Kingdom Hearts Ultimania|Kingdom Hearts Birth by Sleep Ultimania]]''''' "To use a Keyblade you must have been chosen to inherit as well as been chosen by the Keyblade itself. In ''Kingdom Hearts Birth by Sleep'' you could see that Terra performed the ceremony with Riku, and that is why Riku was able to take the Keyblade that Sora used."</ref> In comparison to Sora's two-handed style and Roxas's dual-weaponry, Riku attacks with a fast one-handed style with his Soul Eater/Way to the Dawn. Riku attacks very quickly with either weapon in combat, and is just as able with his weapons as Sora is with his. His strength and agility are best demonstrated on Destiny Island, where he is known as the strongest child on the island (Tidus remarked that he, Wakka, and Selphie were defeated by him even after they triple-teamed him), and possesses an athletic springing kick if knocked down. Though Sora has bested Riku on several occasions, it is still unclear who is stronger. Riku is also shown to be skilled in hand to hand combat, as shown in ''Kingdom Hearts 358/2 Days'', in which he knocks down a charging Xion with a single punch after dismissing his Soul Eater weapon. Riku's strength is demonstrated in ''Kingdom Hearts II'', when Roxas tells Sora during battle that he has defeated Riku - when Sora repeats Roxas's claim to Donald and Goofy, Donald exclaims "But nobody could defeat Riku!", and Sora agrees.

At first, Riku had no powers whatsoever, although he was a rather strong individual. After arriving in Hollow Bastion he gets his weapon, Soul Eater. It gave him a slight increase in power, but as seen in the battle versus the Parasite Cage, he was only slightly more powerful than on the islands.

Sometime after [[Monstro]], Riku made a pact with Maleficent. This gave him three new abilities: The ability to summon and control [[Heartless]], the power to traverse the worlds using Corridors of Darkness, and finally the ability to craft Anti forms. He demonstrated the first two abilities several times, and the third he used on [[Sora]] to create many [[Anti-Sora]]s and one complex one wielding a shadowy [[Keyblade]].

After Sora left [[Neverland]], Riku returned to Maleficent who gave him a large increase in his dark abilities. This allowed him to draw on dark energies to increase his physical power and clothe himself in an organic-looking suit of darkness. While in the dark form he could zip around the battle field at an incredible speed and each blow from his Soul Eater dealt large damage. However, this form was taxing on his heart as seen after his battle with Sora in Hollow Bastion.

It is revealed that Riku was to be the original recipient of the Keyblade, but when he opened the Door to Darkness in Destiny Islands, plunging that world into Darkness, it instead chose Sora. However, in Hollow Bastion, Riku took the Keyblade from Sora by using the sheer strength of his heart, though when he uses the darkness within himself, his power over the Keyblade weakens and it returns to Sora who had proven the strength of his own heart.

When Ansem, Seeker of Darkness, possessed his body he gained incredible new powers, but he was now stuck permanently in dark form because of the darkness pouring out of him. In addition, he took six of the seven Princesses' hearts and used them to form the [[Keyblade of People's Hearts]]. Riku's enhanced dark powers under possession are Dark Raid, where he throws a spinning Dark Keyblade, Dark Break where he performs a powerful jump attack, Dark Firaga where he counters a spell by shooting an orb of dark energy, and Dark Aura where he dashes around the arena at high speed slashing all in his path.

When he is playable in ''[[Kingdom Hearts: Chain of Memories]]'', he is given a preset deck in each world that cannot be changed and changes automatically during gameplay. By breaking his opponent's cards, Riku acquires "DP", which let him transform into his Dark Form. Dark Form, along with giving him decreased speed and increased strength, gives him access to [[sleights]] that mimic his special attacks from ''Kingdom Hearts''. Outside of Dark Form, any combination of stocked cards counts as a sleight and costs Riku a card, so he cannot perform combo attacks as easily as Sora can. Instead, he has access to a unique system of battle called "card dueling", which allows Riku to stun opponents and perform special commands by breaking their cards multiple times.

Overall, in contrast to Sora who must rely on sleights and combos to fight, Riku's playing style is more up-front, relying on card duels and breaks to acquire DP and enter Dark Form. In this game, Zexion said his scent is very similar to the [[Xemnas|Superior]]'s. In gameplay, it is also shown that Riku can run faster and jump higher than Sora.

In the end of ''[[Kingdom Hearts 358/2 Days]]'', he used the power of darkness to assist him in the fight against Roxas. This surge of power distorted his physical form, causing him to appear identical in appearance to Ansem, Seeker of Darkness. While trapped in this form he could use Xehanort's Guardian and use some of Ansem's attacks for a limited time in addition to his other powers.

Riku's Soul Eater changes into [[Way to the Dawn]] sometime between the second visit to [[Land of Dragons]] and [[The World That Never Was]]. When he turned into his "true form" in the end of ''[[Kingdom Hearts II]]'', his powers of light increased dramatically while his powers of darkness decreased. As a party member, Riku possesses various abilities that combine his dark powers with Sora's light powers. Riku can use a new Dark Aura that fires Dark Firaga orbs that inflict a [[Stop]] effect whenever Sora completes a combo, Dark Shield to project a barrier of darkness, as well as to numerous other powers. In his Limit with Sora, Eternal Session, Riku is able to project waves of dark energy from his Keyblade in addition to unleashing fast combos and Dark Firaga barrages.

At the end, Sora and Riku toss their Keyblades together to act as a super-damaging magnet. It should be noted, though, that despite the fact that Riku is a wielder of the Keyblade, he can't use any of Sora's [[keychains]] while he is in the party. Also, Riku is one of the three only characters shown being able to summon [[Synch Blade|more than one Keyblade]] at once, the other two being [[Roxas]] and [[Sora]].
<center><gallery>
File:Soul Eater KH.png|[[Soul Eater]]
File:Keyblade of People's Hearts KH.png|The [[Keyblade of People's Hearts]]
File:Way to the Dawn KHII.png|[[Way to the Dawn]]
File:Oblivion KH.png|[[Roxas]]'s [[Oblivion]]
File:Riku's Bladecharge KHD.png|The [[Bladecharge|charged]] Oblivion
File:Riku's Bladecharge 2 KHD.png|The charged blade in Riku's Limit Break

</gallery></center>

===''Kingdom Hearts''===
In ''Kingdom Hearts'', Maleficent gives Riku the power to control the Heartless for a short time. Later, Maleficent unlocks his dark powers which he has used throughout the series. Ansem, Seeker of Darkness possessed Riku and gave him all of his power. In ''Kingdom Hearts: Chain of Memories'', Riku was able to escape the Realm of Darkness through the subconscious use of his dark powers. Riku also gained full control over his dark powers and finally defeated Ansem.

===''Kingdom Hearts: Chain of Memories''===
{|class="wikitable" width="100%"
|-bgcolor="#87ceeb"
|style="text-align:center"|'''Dark Mode'''
|width="500" style="text-align:center"|'''Activation and Description'''
|-bgcolor="#e6e6fa"
|width="10%" style="text-align:center"|[[File:KHCoM-RikuRepSpr.gif|50px]]
|width="90%"|Dark Mode can be activated when you have accumulated the maximum dark points (DP) through card breaks or taking damage. In Dark Mode, Riku's skills are powered up, and you have more powerful sleights to choose from. DP is lost when your cards are broken or you receive damage. Riku returns to normal when the DP gauge reaches zero. To increase the DP available during Dark Mode, choose Darkness Boost when leveling up; the more DP you have, the longer you will stay in Dark Mode.
|}

'''Attack Sleights'''
{|class="wikitable" width="100%"
|-bgcolor="#87ceeb"
|width="15%" style="text-align:center"|'''Ability'''
|width="55%" style="text-align:center"|'''Description'''
|width="30%" style="text-align:center"|'''Requirements'''
|-bgcolor="#e6e6fa"
|'''Dark Break'''
|Leap into the air and attack enemies from above. Only available in Dark Mode. In ''Re:Chain of Memories'', press {{button|t}} when it flashes on-screen to add an attack. Pressing {{button|t}} when it isn't on-screen will cancel the sleight.
|{{sleight|Soul Eater|Soul Eater|Soul Eater|5-15}}
|-bgcolor="#e6e6fa"
|'''Dark Firaga'''
|Expel dark energy in a searing blast. Only available in Dark Mode. This attack is dark-elemental, not fire-elemental.
|{{sleight|Soul Eater|Soul Eater|Soul Eater|16-25}}
|-bgcolor="#e6e6fa"
|'''[[Dark Aura]]'''
|Rush enemies repeatedly with blade in hand. Finish off by stabbing Soul Eater into the ground for columns of light that confuse the enemy. Only available in Dark Mode.
|{{sleight|Soul Eater|Soul Eater|Soul Eater|27}}
|}

'''Friend Sleights'''
{|class="wikitable" width="100%"
|-bgcolor="#87ceeb"
|width="15%" style="text-align:center"|'''Ability'''
|width="55%" style="text-align:center"|'''Description'''
|width="30%" style="text-align:center"|'''Requirements'''
|-bgcolor="#e6e6fa"
|'''MM Miracle Lv2'''
|The king restores HP, and stuns and deals damage to all enemies, and reloads cards.
|{{sleight|The King|The King}}
|-bgcolor="#e6e6fa"
|'''MM Miracle Lv3'''
|The king restores a lot of HP, and stuns and deals damage to all enemies, and reloads cards.
|{{sleight|The King|The King|The King}}
|-bgcolor="#e6e6fa"
|'''Holy Burst'''{{ReCoM}}
|Multiple shots back to back with the king. Use the left analog stick to control the direction of the tornado.
|{{sleight|The King|Soul Eater|Soul Eater}}
|-bgcolor="#e6e6fa"
|'''Inverse Burst'''{{ReCoM}}
|Multiple shots with your back against the king's. Enemies become confused when hit. Use the left analog stick to control the direction of the tornado. Only available in Dark Mode.
|{{sleight|The King|Soul Eater|Soul Eater}}
|}

'''Duel Sleights'''
{|class="wikitable" width="100%"
|-bgcolor="#87ceeb"
|width="15%" style="text-align:center"|'''Ability'''
|width="55%" style="text-align:center"|'''Description'''
|width="30%" style="text-align:center"|'''Requirements'''
|-bgcolor="#e6e6fa"
|'''Impulse'''{{ReCoM}}
|Knock foes into the air before a slam down to the ground, damaging multiple enemies. 
|Win a duel that requires you to break three cards.
|-bgcolor="#e6e6fa"
|'''Dark Impulse'''{{ReCoM}}
|Knock foes into the air before a hard slam down to the ground, damaging multiple enemies. Only available in Dark Mode.
|Win a duel that requires you to break three cards.
|-bgcolor="#e6e6fa"
|'''Maelstrom'''{{ReCoM}}
|Unleash a spinning attack on the enemy. Damage is concentrated to one enemy.
|Win a duel that requires you to break five cards.
|-bgcolor="#e6e6fa"
|'''Dark Maelstrom'''{{ReCoM}}
|Unleash a powerful spinning attack on the enemy. Damage is concentrated to one enemy. Only available in Dark Mode.
|Win a duel that requires you to break five cards.
|-bgcolor="#e6e6fa"
|'''Barrage'''{{ReCoM}}
|Throw the Soul Eater towards the enemy. Damage is concentrated to one enemy.
|Win a duel that requires you to break seven cards.
|-bgcolor="#e6e6fa"
|'''Dark Barrage'''{{ReCoM}}
|Throw multiple Soul Eaters towards the enemy. Damage is concentrated to one enemy. Only available in Dark Mode.
|Win a duel that requires you to break seven cards.
|}

===''Kingdom Hearts 358/2 Days''===
[[File:Gameplay (Riku) KHD.png|thumb|Playing as Riku in Mission Mode.]]
{{Main|Mission Mode}}
Riku's Limit Break, Darkstrom, is very similar to his Dark Aura Sleight from ''Kingdom Hearts: Chain of Memories''. During Darkstrom's execution, Riku will rush at the enemy multiple times, similar to Sora's Sonic Blade ability. His Final Limit infuses his weapon with light energy as he wildly slashes about.

===''Kingdom Hearts II''===
As a party member, Riku is very similar to Beast from ''[[Kingdom Hearts (game)|Kingdom Hearts]]'', in the sense that he is the final party member, as well as being the strongest. He has high strength, magic, and above-average defense. He has some of the best abilities such as MP Hastega. Also his main action abilities, Dark Aura and Dark Shield, are activated upon the player's command, which helps him conserve MP for Cure Potion, which fully heals the party. Riku's greatest asset is his Limit, Eternal Session, which is tied with Sora's Trinity to unleash the best Limit in the game. He can equip one accessory and two armor pieces. Riku's abilities are as follows:

* '''Dark Aura''': Riku fires multiple Dark Orbs at the enemy. Available as a Reaction command after Sora finishes a combo.
* '''Dark Shield''': Riku creates a barrier to protect Sora. Available as a Reaction command as soon as Sora takes damage.
* '''Cure Potion''': Riku heals the party to max HP; costs 99 MP.
* '''[[Limit]] Ability''': Eternal Session.

Riku is also temporarily playable during the final battle with Xemnas. During this time, he has only three commands - Dark Aura, Attack, and Jump.

==Trivia==
*Roxas's battle with Riku, as seen in ''Another Side, Another Story'', involves him running up the side of Memory Skyscraper and passing by Riku as he leaps off. A similar scene occurs when Sora and Xemnas later battle in the same area.
*Riku is the first non-party assistance character to appear in the ''[[Kingdom Hearts (series)|Kingdom Hearts]]'' universe as he helps [[Sora]], [[Donald Duck|Donald]], and [[Goofy]] fight the [[Parasite Cage]] in [[Monstro]] the first battle. Riku was also the first party character that can be fought ''against'' in the same game he is fought ''with'', followed by the [[Beast]] and later [[Zack]].
*It is stated in [[Director's Secret Report XIII|The Director's Secret Report XIII]] that one of the four untold stories is "the period of Riku's absence" though that has not been further delved into. The other three were about "the period of the King's absence", Roxas's time with the Organization (''Kingdom Hearts 358/2 Days''), and Xehanort's past (''Kingdom Hearts Birth by Sleep'').<!--NOMURA SAID THAT HE WAS REFERRING TO MICKEY IN THE REALM OF DARKNESS-->
*An interesting note is that Riku wields Soul Eater and the Keyblade of People's Hearts on the opposite side of the handle, with the blade facing down when he's in his battle stance, except as a playable character in ''Kingdom Hearts 358/2 Days''. Even in ''Kingdom Hearts II'' and when he is playable in ''Kingdom Hearts 358/2 Days'', he holds Way to the Dawn on the opposite side, though the blade faces a bit to the side.

==Notes and references==
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