Sigyn (pronounced roughly "SIG-in") is the wife of Loki and the mother of Vali and Nari. She is often recognized as the goddess of Fidelity.
Sigyn at one point married Loki and had two sons with him, Vali and Narvi. After her husband tricked the blind god Hod into killing Balder, her sons were slain and their entrails used to bind their father. Sigyn stayed by her husband's side holding a goblet to catch the venom that fell on Loki's face. She has not spoken since her sons were killed.
Once the wedding party reaches her husbands prison, she stares blankly at them. She is unfazed by her husband's insults towards her. When the fight breaks out she flees, dropping the goblet and letting the venom drip on his face before Randolph Chase cuts him free.
Sigyn appears behind her husband on the deck of Naglfar. During the flyting she leaves her husband and vanishes amount the crowd.
Sigyn's face is described as being so emaciated, she could have passed as a Draugr. She has leathery skin and bloodred tears streamed down her face.
Sigyn has been said having not spoken in a thousand years. She is utterly dedicated to her task of catching the poison that falls upon her husband, but it is also clear that she resents her task and even her husband for his abuse. However she shows no emotions outwardly. She is completely withdrawn ever since the Aesir butchered her sons, and she shows no animosity towards her step-daughter or step-child.
Oath Guardianship: As the Goddess of Fidelity, it is possible that she holds sway over oaths and the breaking of oaths.