Sigyn

Sigyn is the Norse goddess of refusal of defense. She is mainly a minor goddess and character throughout Norse Mythology.

Marvel's Sigyn
Sigyn has a bigger role here in marvel, she was engaged, when Loki killed her fiance and married her instead. Loki was confined to a punishment of being tied to a rock and a serpent would drip venom on his face. Sigyn was loyal to Loki, she would use a bowl to store all of the Venom. But while she was gone (to empty the bowl) some venom would drop on Loki's face.