She's not Normal (Diabolik Lovers fan fiction)

Yui Komori has a cold and distant sadistic older adoptive sister who's a vampire mixed with something else, a cat. Hinamori Komori is a half neko half vampire and half sister of the Mukami brothers. She was abandoned by her family when she was 5 and got adopted by Yui's father that same year. She isn't really a nice person, she has cat ears, a tail and fangs. She is 19 and ready to raise hell. No one and I mean no one is to stand in her way of achieving her goals. She is an assassin named the Phantom Feline and will get what she wants.