Sif

Sif is a fictional character appearing in comic books published by Marvel Comics, in particular those featuring Thor. Based on the mythological being of the same name, Sif first appeared in Journey Into Mystery #102. She is an Asgardian warrior and lover of Thor, who spends much of her time worrying about and searching for him, and often accompanies Thor into battle. She has also battled alongside Balder, who has developed an unrequited attraction to her, as she never shows affection for anyone but Thor and certain individuals that resemble him greatly.