How do I defeat a youkai, /2hu/? She barged into my ordinary life, bringing with her the abnormalities of other worlds.
According to her, my "chaotic evil" nature will turn me into a messiah that will bring many changes to this world and she wants to speed up the process "before it's too late" (I'm under the assumption that this has to do with the human lifespan).
I know she's a youkai because she wears frilly dresses, has a ribbon in her hair and can shoot barrages of small projectiles at will.