Fanon:Raven Sin

Raven Sin is a sciencist who live in Moonlight Falls, she lives with a gun fairy River Kalashnikov. According to her bio, she has grey skin and an unnatural light eyes color because of her hobby of researching strange things. she is immune to fire, it probably also because of this. She found River, then take him home for her researching. She hasn't insane or evil trait, it may hints that she won't do any "excessive" thing to River.

Raven and River are similar to Manzhu Sha and Rifle Armalite.