Editing Aqua

Aqua meets Terra in the [[Castle of Dreams]], where she learns that Master Xehanort is looking for hearts of pure [[light]], but she is comforted to hear that Terra had learned there that believing in a dream has the power to hold back the darkness. However, her faith in Terra is shaken when she arrives in [[Enchanted Dominion]] to learn that, according to [[Maleficent]], Terra willingly helped steal [[Aurora]]'s heart for her. Aqua later catches sight of Terra in the [[Lanes Between]] and pursues him to [[Radiant Garden]], but loses track of him there.

Aqua meets [[Mickey Mouse]] and the young [[Princess of Heart]], [[Kairi]], who touched Aqua's Keyblade in fright, unintentionally performing a [[Bequeathing]]. Aqua and Mickey protect her from a group of Unversed, and in return, Kairi gives Aqua flowers, which becomes the Keyblade [[Destiny's Embrace]]. Aqua also places a protective charm on Kairi's necklace to help her in the future, believing that their meeting may not have been a coincidence. This charm would later transport Kairi to [[Destiny Islands]] where she would be with someone who would always protect her, while [[Ansem, Seeker of Darkness|Ansem]] believed it was because Kairi, as a Princess, was naturally drawn to the Keybearer.

While in [[Neverland]], Aqua encounters [[Peter Pan]] and the [[Lost Boys]], joining them on their treasure hunt. They later find their treasure chest, filled with wooden swords and Ventus's [[wooden Keyblade]]. Peter Pan tells Aqua that Ventus left the toy there as he no longer needed it. Aqua then senses someone nearby and goes off to investigate. She then encounters Vanitas again, this time with Ventus's cherished Wooden Keyblade. The dark enigma cruelly mocks Aqua's actions and snaps the toy weapon in two. Greatly enraged by this, Aqua battles and defeats him again, but is left exhausted by the fight. Believing him to be dead, she allows herself to pass out. While unconscious, she reminisces about the first starry night she spent with Terra and Ventus. She soon recovers and leaves Neverland.

At one point Aqua and Terra come to Destiny Islands and meet two young boys by the name of Sora and [[Riku]]. Aqua sees the strong bond between the two friends and advises Sora to help Riku if he ever falls into darkness; though she initially intends to grant Sora the power to use the Keyblade, she decides against it upon discovering that Terra had already done it for Riku, not wishing to put the two innocent children through the ordeals she and Terra have faced.

Aqua later encounters an unconscious Mickey drifting in space and takes him to the [[Mysterious Tower]], where she hears of Eraqus's death from [[Yen Sid]] and heads to the [[Keyblade Graveyard]] to meet up with Terra and Ventus.

A short conversation with Ventus takes place there, one where he states that if he does become the [[χ-blade]], he wants the two of them to "put an end to me". Aqua appears horrified, but Master Xehanort makes an appearance and tells about the history of the [[Keyblade War]]. Afterward, they attack, and a great battle takes place. Xehanort holds Ventus over the edge of a cliff where Aqua can see, he freezes the boy and drops him; however, she manages to catch him. After fighting [[Braig]] and then Ventus under Vanitas's influence, the X-blade is destroyed and she is flung into the Lanes Between, unconscious. Mickey finds her and Ventus drifting there and brings them both to [[Yen Sid's Tower]], where it is revealed to her that Ventus has lost his heart. She takes Ventus back to the Land of Departure and places his sleeping [[body]] in a throne. She takes [[Master's Defender|Eraqus's Keyblade]] and transforms the world into [[Castle Oblivion]] to keep Ventus safe. Afterward, she says her goodbyes to Ventus, fondly stroking his hair, and leaves. She then tracks down [[Terra-Xehanort|the possessed Terra]] to Radiant Garden.  

Failing to bring Terra back to his senses, Aqua fights and defeats Xehanort; subsequently, Xehanort stabs himself in the chest with his own Keyblade in an attempt to lock Terra out as a horrified Aqua looks on. As Terra-Xehanort falls through a portal into the [[Realm of Darkness]], Aqua dives in after him but quickly realizes that she will be unable to save them both. Instead, Aqua sacrifices her [[Keyblade Armor|armor]] and Keyblade to save the dark being that had once been her dear friend, sending him back into the [[Realm of Light]] while she remains behind. Now stuck in the Realm of Darkness, Aqua is attacked by [[Darkside|several giant Heartless]] and decides to just allow them to destroy her, but is saved by Terra and Ventus's Keyblades. She is then reminded of the people she is connected to. With renewed trust in her friends, Aqua looks at her Wayfinder.