A Himalayan Black Bear, who is Bear's worst enemy and Bear's chief rival for the attentions of the She-Bear. The Black Bear has an arrogant and unsportsmanlike personality, cheating to win against Masha in a tennis game, and laughing at her when she grows gigantic. Bear's biggest fear is if Black bear and she bear marry which is shown in ep. 59. Game Over when bear imagines what will happen if he Plays games his whole life.
He likes fishing and pumping muscles. He has been acquainted with Bear and She-Bear since childhood, when Bear's father tried to make a music band from them. Since then, he can play some musical instruments.
Him is not liked by almost all the main characters (except for the She-Bear).