Kingdom Hearts III
Sven first appears with Anna and Kristoff being led by Olaf to Elsa's palace. When the group encounter Sora, Donald, and Goofy, Kristoff leads Sven and Olaf away while Anna explains Elsa's past. Offscreen, they are attacked by the Heartless and Olaf's parts are separated. The team reassembles Olaf with Sven returning his carrot nose (nearly eating it). When the Heartless, Sora and friends hold them off while Sven and the others make their escape.
A while later, Sora, Donald, and Goofy arrive at Elsa's palace, finding Sven's tongue stuck to the icey rail. Sven makes his escape after Anna and Kristoff are thrown out by Elsa's guardian, Marshmallow.
When Anna becomes cursed by Elsa's magic and with only an "act of true love" can save her, they return Anna to Arendelle to receive a kiss from her fiancé, Hans. As Sora and friends find Kristoff reluctantly taking his leave, Sven—knowing Kristoff is Anna's true love—refuses to leave the kingdom, and urges Kristoff to turn back. Though Kristoff denies having any feelings, he quickly changes his mind upon seeing the castle being consumed by a blizzard.
After the Sköll is defeated, Sven and the others are mourning over the death of Anna, whose body has been consumed by the curse. Fortunately, her body begins to thaw as she had performed an "act of true love" by sacrificing herself to save Elsa. Elsa then finds a means to restore summer, with Sven eagerly licking at the snowflakes as they lift from the ground.
Sven is a reindeer, with large hooves and long branched antlers. He is also equipped with reins around his chest, which allows him to pull Kristoff's sleigh.
Sven is both a loyal and playful companion to Kristoff, often supporting him in dire times. When Kristoff refused to follow his heart, Sven will step up and act as a form of conscious, encouraging him to do the right thing. However, when Kristoff's stubbornness gets the better of him, Sven shows a rather stern and no-nonsense attitude, defiantly standing his ground until Kristoff comes to his senses.
Sven first appeared in the 2013 Disney film Frozen. Though he has no speaking role, he communicates through his facial expressions and movements, which Kristoff can understand. Sven has been Kristoff's companion since they were little, working together at harvesting ice, with Sven pulling the sled that carries the ice. Following this, they meet several trolls that are disguised as rocks, and a female troll adopts Sven and Kristoff. Years later, the two of them travel together to the kingdom of Arendelle on the coronation day of Queen Elsa. In the forest near Arendelle, they subsequently meet Princess Anna, Elsa's estranged sister, who has left to find her and undo the everlasting winter she unknowingly placed in the kingdom. When she meets them, she convinces them take her to the North Mountain were Elsa is hidden. On their way, Sven and Kristoff lose their sled after being chased by wolves, but Sven convinces Kristoff to continue helping Anna nonetheless.