Muse

Muse is a dark and menacing creature that takes the form of a black cat, a young girl with black hair and feline eyes or an older anthropomorphic feline with black fur - in all her forms Muse is a type of evil genie who grants the desires of others but twists them to her own sadistic will: she is a capricious and cruel trickster who may aid some and torment others just for the sheer thrill of it and when not granting the wishes of others she can often be found cursing people with terrible afflictions such as transformation into lowly vermin, removal of sanity or randomly launching them to another dimension.