Hel

Loki's only daughter, Hel is the goddess of the underworld. Portrayed as an adolescent girl with wavy pink hair, green eyes and glasses, and a strong obsession with her father, though the nature of it differs between the manga and anime. In the anime, she is seen to be trying to kill Loki at first as Odin told her that Loki and her brothers no longer care for her and hated her, thus, making her wanting to make Loki experience the same kind of pain she experienced. In the manga, she wishes to kill her father so that he will always be with her in the underworld.

(Source: Wikipedia)