Insane by @sakarataryn (Jaime Thompson)

Iori is a gentleman, a noble kind of person, someone who holds doors for the elderly and plays with kids. Unfortunately, his poor mind has long since gone out the door, and now only Sakara can bring about that kinder person in him. Everyone else is subject to his rather sadistic ways of murder. He won't touch kids, but everyone else is probably better off to stay away.