Ice King (voiced by John Kassir in short, Tom Kenny in series) - Ice King is so far the only recurring antagonist of the show. He's an old, lonely, sociopathic ruler of the Ice Kingdom who is obsessed with capturing princesses in hopes that one of them may want to become his wife; even threatening them with death if they refuse. He is shown, however, to have companionship with the penguins and snow and ice beasts who populate the Ice Kingdom. His magic powers (primarily freezing things by hurling 'frozen lightning bolts', summoning snow monsters, and flying with his beard) stem solely from the magical crown which rests on his head. At one point he temporarily lost his heart, who became his own character: Ricardio the Heart Guy.