Good or Evil? {Supernatural Fan Fic} [Dean x OC]

A small cat, it what is seemed as a normal cat, from Japan all the way to America on the doorstep of the bunker. Sam takes the small kitten in and Dean has to keep his distance for his allergies, making the small cat, which is later named Maple because of the light brown coat, is sad and wants to be near Dean, but he always pushes her away. Sooner or later, they find out a huge secret of hers, she's half human as well. Is she friendly like any normal girl, or evil like any monster?