Kristoff

Kristoff is the hero and the tritagonist from the 2013 Disney movie Frozen. He is a mountain ice-selling man who had been raised, with his loyal reindeer Sven by trolls who disguise themselves as rocks. He is tough and grouchy on the outside, but he is caring and sensitive inside, proving himself one of the foils to the villain Prince Hans.

Kristoff was voiced by Jonathan Groff as an adult and someone unknown as a child.

Official D23 website
The character Kristoff (voiced by Glee's Jonathan Groff) is a mountain man. He's a rugged individualist and a kind of a loner. He's his own man and the guy who feels he doesn't need anyone in his life... Sven can get along just fine—thank you very much. He is an ice harvester. And in cold regions where we visited there are people just like farmers who harvest ice from frozen lakes. They cut it out and place it on long flatbeds and put it in storage. And that's how our film actually opens—we see the ice harvesters at work and we meet, at that time, a very young Kristoff and Sven. He's 8 years old and he's learning the trade from the adult ice harvesters. We see a baby Sven with him, too, who's trying to tow his own block of ice with the big guys. Kristoff is such a loner that he is reluctant when Anna (voiced by Kristen Bell from Forgetting Sarah Marshall) asks him to help her navigate the mountain terrain to find her sister. But he knows the area better than anybody else, so he agrees.

Official Disney Bio

 * Kristoff is a true outdoorsman. He lives high up in the mountains where he harvests ice and sells it to the kingdom of Arendelle. Rough around the edges, Kristoff's the strong, no-nonsense type, who follows his own set of rules. He may seem like a loner, but he always has his best friend by his side—a loyal and extremely mangy reindeer named Sven.

Personality
Having spent many years of his life without any real contact outside of the trolls and Sven, Kristoff is a bit of an individualist and acts as a loner. He can also be rather grumpy and selfish at times, as well as a bit lazy. But with all these flaws comes a heart of gold as well, as the ice harvester has shown multiple times throughout the film that he has a loving heart and deeply cares for those who treat him with love and sympathy in return, such as Sven, the trolls and later Anna. His relationship with Sven is a perfect example of his soft side, as he's shown to put Sven over anyone else, going as far as to only saving Sven's carrots when his sleigh was seconds away from being destroyed, leaving the other much needed equipment aboard, feeling that Sven's happiness and health is far more important.

Kristoff is also known for doing voice-overs for Sven, being able to understand the reindeer's thoughts via his expressions, and decided to simply speak for him when they have conversations. They also share a "duet" together; their nightly lullaby. And according to the lyrics of the lullaby "Reindeer(s) Are Better Than People", Kristoff apparently had a distrust towards others, believing people will only hurt, cheat and curse him and that they're all bad, explaining his loner lifestyle.

Kristoff's loving side is brightly showcased during his time with Anna. Throughout the start of the adventure, Kristoff shows disinterest in going to find Elsa or assisting Anna in conquering the mountains, but soon comes around through the "persuasion" of Sven. And as the journey continues, Kristoff grows attached to Anna's fun-loving and sweet ways, becoming very loyal to her and protective of her. By the end of the film, Kristoff and Anna fall in love completely, though the mountain man shows to be quite the shy, awkward one around his sweetheart, once again showing his softer side.

Kristoff's Beginnings
At the start of the film, the orphan Kristoff is seen as an apprentice to ice harvesters as a young boy (he is 8 years old at this point, according to Disney). He is trying to learn their ways however he can as he tries to harvest ice himself, along with his reindeer calf Sven. On one fateful day, Kristoff is falling behind the other harvesters when he notices a pair of horses rush by him at high speed, the grass freezing behind one of them. He is unaware that the Curious, Kristoff follows them into a clearing and discovers the trolls. He and Sven watch from a distance as the elder troll Pabbie heals Anna by erasing her memories of Elsa's ice powers. As they spy, they are discovered by one of the trolls, Bulda, and she decides to take in the two orphans. From there, Kristoff and Sven became family with the trolls, officially taking residence in their valley.

Thirteen years later, Kristoff and Sven sell ice in Arendelle for business, and are seen out in the village during Princess Elsa's coronation after the death of the original monarchs. Whilst the kingdom is abuzz with excitement and festivities, Kristoff is there to do business with his ice. He isn't attending the party at the castle; that's only for royalty and other VIPs.

Meeting Anna
Kristoff isn't seen again until later, after Elsa freezes the kingdom. He arrives at Wandering Oaken's Trading Post and Sauna and runs into Anna for the first time in 13 years while buying rope, an ax, and carrots for Sven after experiencing a rough blizzard in the North Mountain, completely covered in a layer of ice and snow - he's so bundled up that only his eyes are visible, and later the bottom half of his face when he lowers his neckerchief. However, while Anna realizes that the blizzard is Elsa, Kristoff gets into an argument with Oaken when he doesn't have enough money for all of his items, and calls Oaken a crook, causing an upset Oaken to toss him out. Kristoff decides to crash in a nearby shed with Sven for the night until Anna buys him the items he wanted, plus a winter outfit for herself, and asks him to guide her to the North Mountain. He says no at first, but after Anna tosses him the stuff he wanted to buy, he agrees to take her in the morning, but she demands they leave in that moment, which he agrees to after she reveals that she has also purchased Sven's carrots.

The Journey
The trio head off as Anna explains her desire to marry Hans even though they just met that day. Kristoff argues about this, as he doesn't understand how a girl can marry someone she just met. Then they are chased by wolves, and are about to fall off a cliff, but Kristoff tosses Anna onto Sven's back and cuts the rope to the sleigh, causing them to jump to the other side safely, but Kristoff's sleigh, along with nearly all their supplies, falls to the bottom and catches fire (most likely from the sleigh's lantern). Kristoff looks sad, and mentions to himself that he "just paid it off" before Anna pulls him up. Feeling bad about causing him to lose his sled and nearly killing the three of them, Anna tells Kristoff that she will buy him a new sled and that he doesn't have to help her anymore. Kristoff is about to abandon her, but Sven "talks" to him (telling Kristoff that if he doesn't help Anna, she will die, and he won't get his new sled if she's dead) and urges him to continue the journey with her.

Finding the Snow Queen
The group then stumble upon a talking snowman named Olaf, and are freaked out by him. They ask him if he knows where to find Elsa, which he does. Olaf then sings and tells them that he dreams of doing things in summer. Kristoff states that "I'm gonna tell him" that snow melts in summer, but Anna tells him "Don't you dare!". Olaf then leads them to Elsa's palace. Kristoff stares at the ice palace, and is overwhelmed by it, awestruck by how beautiful and complex the ice palace is. Olaf, Sven and Kristoff (who is extremely reluctant about not seeing the rest of this amazing structure) wait outside while Anna tries to convince Elsa to come back. Elsa, worried about harming her sister, refuses, and tells her to run Arendelle while she lives alone and free in the mountains. Anna, however, informs her that she had accidentally set off an eternal winter in the kingdom, and as she tries to convince Elsa that she can undo it, Elsa creates a snowstorm inside and accidentally strikes Anna, freezing her heart. Elsa then orders her sister to leave again, and creates Marshmallow to throw her, Kristoff and Olaf out. Anna angers the snow monster, and it chases them from the palace and over a cliff. The group land softly in the snow below. As Kristoff helps Anna up, he notices that her hair is turning white. Realizing that Elsa struck her again, Kristoff believes he has a solution, and leads the gang to the Valley of the Living Rock, where the trolls reside.

Family Reunion
Along the way there, Kristoff starts showing great worry and care for Anna, and unknowingly falls in love with her. Upon their arrival, Kristoff begins talking to the trolls, who, at the moment, look like normal boulders. Olaf and Anna are both put off by this strange behavior, but then the trolls reveal themselves properly, and start greeting Kristoff. After exchanging pleasantries, Kristoff inquires as to the whereabouts of Grand Pabbie, and learns that he's currently asleep. They then notice Anna and Olaf. Kristoff's adoptive mother - Bulda - immediately assumes Anna is Kristoff's girlfriend, but when the two deny any romance, Bulda and the trolls try to convince them otherwise, telling them they're meant for each other. They arrange an entire wedding, but before it's complete, Anna nearly faints and loses balance, with Kristoff catching her in his arms and anxiously informing the trolls she's freezing cold. Pabbie, although he is powerful, is unable to heal her, and he tells them that unless Anna can perform an act of true love, she'll freeze and die. Bulda believes the act of true love would perhaps be "true love's kiss," which prompts Kristoff to take Anna back to Arendelle so she may receive a kiss from Hans, her supposed true love. They reach Arendelle, and Kristoff sadly relinquishes her to Hans' care, believing that she will be truly happy with him. He then rides off, away from Arendelle, visibly gloomy and sad.

Race Back to Arendelle
Unbeknownst to him, Hans doesn't really love Anna, as he was only using her to become the king of Arendelle. Kristoff heads out of Arendelle, and Sven tries to convince him to go back, but Kristoff believes that Anna already has a true love and doesn't need him. Meanwhile, Olaf who got separated from the group, finds Anna lying in the library freezing, and he starts a fire for the princess. Back with Kristoff and Sven, the reindeer starts pushing Kristoff back towards Arendelle. When Kristoff sees a giant snowstorm (created by a frightened Elsa), he realizes that Anna is in danger, and he and Sven quickly rush back to save her. Olaf sees the two heading back, and tells Anna that Kristoff is the one that truly loves her, and it's his kiss that can save her. Meanwhile, Hans informs the visiting dignitaries that Elsa killed Anna, and before she died, they married, making him the king. The lie is consumed, and Hans gains the throne. Needing her killed to put an end to the winter, Hans follows the queen into the fjord as she tries to return to her ice palace. Anna and Olaf arrive in the fjord as well, but Elsa's mounting fear causes a harsh blizzard, speeding up Anna's dying process.

Summer Returns
Anna spots Kristoff from a distance, but she notices Hans and Elsa not too far away as well, where the evil prince is seconds away from murdering the Snow Queen with his sword. Sacrificing her life for her sister, Anna leaps to the rescue and puts herself between Elsa and Hans, freezing to death seconds before the sword hits her. The sword shatters against Anna's frozen hand, and Hans is knocked out from the impact just as Elsa realizes what happened. She tearfully mourns her sister, as Kristoff, Sven and Olaf, who have just arrived, watch sadly from a distance. However, Anna's sacrifice was an act of true love (for her sister), and she is soon revived from her death, much to everyone's complete joy. Along with Anna's revival comes the entire kingdom's thawing when Elsa realizes she needs to harness the power of love to end the eternal winter. As Hans awakens, Kristoff's ready to beat him up for what he did. But Anna stops him (while assuring him that she'll handle this) and punches Hans herself, knocking him overboard.

After peace is restored to the kingdom, Anna leads a blindfolded Kristoff to the docks. She removes the blindfold, and Kristoff sees a new sleigh promised by Anna. Kristoff attempts to deny the offer, but Anna tells him that there is no taking back, as Elsa has named him the "official Arendelle Ice Master and Deliverer." When asked by Anna whether he loves it, Kristoff joyously picks Anna up and spins her round, overjoyed to the point he wants to kiss Anna, but becomes embarrassed and puts her down. Anna kisses him on the cheek, and allows Kristoff to do so for real, then Kristoff kisses Anna properly, finally initiating their relationship.

Kristoff is last seen skating with Sven, Anna, Elsa, Olaf, and the others during the finale after Elsa creates an ice skating rink in the castle courtyard, celebrating her return as queen, as well as the return of summer.

Frozen Fever
Kristoff is set to appear in the upcoming animated short, as the one of the primary protagonists. In this story, Kristoff is assisting Elsa in throwing a celebration in honor of Anna's birthday.