Grigori Rasputin is the primary antagonist of the first movie, Hellboy. A different incarnation from the original real life character, Rasputin is a powerful sorcerer, who sides with the Nazis, in order to achieve his goals. This version of the character appears, as the Live-Action counterpart of the same character from the animated movie, Anastasia, for only a short screentime, in the Non-Disney Villains Tournament.
Non-Disney Villains Tournament
For information, regarding about the character's origins, see here.