Demon Hunters and Angel Killers

I am alone. I am lost. I have no memory. Who am I? 4 years ago, Raven woke up in a dark alley - being shaken awaken by a young man. He told her his name was Theo and that he was going to take care of her. the only thing she remembers is her father. the memory of him is faint but still there. 4 years later, Raven has g...