Kristoff
Physical Appearance
Kristoff is a tall, good-looking, slender 21-year old man. He is also quite muscular and strong, no doubt from his several years as an ice harvester. He has blond hair (more golden than Anna's, but not as pale as Elsa's) which is later described as "unmanly" by the trolls (in the song "Fixer Upper"). He also has light brown eyes and (like almost every character) fair skin with a few freckles across his nose. His nose is quite big and his cheeks tend to redden a lot, either from the cold or embarrassment.At the beginning of the film (when he is a child), his outfit consists of a royal purple long sleeved shirt, dark trousers, and a purple sash. When we next see him as an adult, he is wearing a thick dark tunic with a fur-lined burgundy (purplish-brown) collar and a blue patch on his right elbow, a burgundy sash tied around his waist, a dark blue long sleeved undershirt, brownish-green mittens, thick dark trousers, a dark bobble-hat (which he later gives to Anna when she is freezing to death), and fur-lined dark-green boots with pointed toes. At the end of the film, he is wearing pretty much the same outfit, minus the thick tunic and gloves (mostly likely because it is too warm).
Role in the Film
At the start of the film, Kristoff is seen among 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 following behind the other harvesters when he notices the King and Queen of Arendelle rush by him with their two daughters rapidly, the grass freezing as they travel by. Curious, Kristoff follows them to the Valley of Living Rock and discovers the trolls. He and Sven watch from a distance as the elder troll, Pabbie, heals Anna but erases 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. 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 royals from all around, Kristoff and Sven are out and about too, but don't attend the castle festivities, likely because it's meant for royalty and VIPs only.
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 says to Anna that Kristoff is crazy as they watch him talk to what looks like normal rocks, and Olaf tells Anna to run. The trolls then 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 adopted 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, 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 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.