Loki

Loki is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Stan Lee, scripter Larry Lieber and penciller Jack Kirby, a version of the character first appeared in Venus #6 (August 1949). The modern day incarnation of Loki first appeared in Journey into Mystery #85 (October 1962). The character, which is based on the Norse deity of the same name, is the Asgardian god of mischief. He is the adopted brother and often enemy of the superhero Thor, however over the years the character has been depicted as an antihero. Wikipedia