Kristoff

Kristoff is a primary character in the upcoming 2013 film Frozen. He is described as being risk-taking, brave, tough, grumpy, and extreme.

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.

Info
Taken from the official D23 website

“Our 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 a long 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 about six 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.”

Trivia

 * It should be noted that Kristoff's current design is much like an early design for Flynn Rider, known as "Bear Flynn" or "Bastion." That design was bulky, largely-built, and that version of Flynn Rider was sweet and charming (which is majorly unlike Kristoff's character).
 * Both Kristoff's voice actor (Jonathan Groff) and Elsa's voice actress (Idina Menzel) have been recurring characters on the FOX television series Glee. Groff played a character named Jesse St. James, a love interest to the character of Rachel Berry. Menzel played Rachel's mother, and the vocal coach of Jesse's Glee Club, Vocal Adrenaline.
 * Kristoff is described as being the opposite of the character of Hans. While Hans is stiff, proper, and diplomatic, Kristoff is bulky, rather grumpy, and tough.