This is a portrait of Sigyn Eiriksdottir from a fan fiction called "In the End, You Will Kneel" by IncantationFetter. I'm kind of working on this character's design free of charge, full body and everything (I haven't posted it here), but it's because I just love the fic so much and Sig herself. But it is in the end fan art. If you love Loki...You MUST read this fan fiction.
This portrait was done using a reference of the actress Giulia Davis.