Krampus (Kristofer Hivju)

He is the evil adoptive brother of Santa Claus and the former lover of Grýla. Krampus dedicated his life to punishing all the naughty children of the world around Christmas time. During the climax, Krampus assists Santa, Callum Drift, and Jack O'Malley in defeating Grýla, making amends with his brother in the process.

He was portrayed by Kristofer Hivju.