Spica

Spica スピカSupika is the reincarnation of Angrboda, the giantess who bore three of Loki's children (the ones that were a precursor to Ragnarok). She is the mother of Fenrir, Jormungand, and Hel. In her human form, Spica is a normally mute girl with a HUGE appetite. In the anime she only appears briefly in the final episode. And she became the maid of the Enjaku Detective Agency.