Prince Hans

Hans is a major character from Disney's upcoming movie Frozen & the rumored true main villain, with the Duke of Weselton as the secondary villain. Despite the film isn't shown, many junior novelizations have spoiled the movie by some readers saying he is the true main villain. Despite that this is just taken and rumored from Disney wiki and some spoilers of the movie's book in some websites, many future edits will be told soon.

Official Disney Bio
"Hans is a handsome royal from a neighboring kingdom who comes to Arendelle for Elsa’s coronation. With 12 older brothers, Hans grew up feeling practically invisible—and Anna can relate. Hans is smart, observant and chivalrous. Unlike Elsa, Hans promises he’ll never shut Anna out; he just might be the connection she’s been waiting for all these years."

Trivia

 * Hans is very similar to Lotso from Toy Story 3. Both being friendly in their outside appearances but are actually evil in their true nature.
 * It is also rumored that Hans and the Duke of Weselton are secretly working together.
 * Hans is also very similar to Henry J. Waternoose III from Monsters, Inc., boing being the friend of the hero but actually turned evil and betrayed them for their desires.
 * Hans is also similar to Gaston from Beauty and the Beast, both being handsome and both attempting to make themselves look like a hero by killing innocent figures who look evil.