As I said before, the DNA in her body wasn't meant for her, creating something else entirely that isn't in perfect harmony with the rest of her body. It's almost like having a split personality, but this one is like a mirror image of Shilo, but more blood-thirsty and feral. There was a show/movie/book or whatever that had something similar to this, and for the life of me I can't remember where I seen it! ._.