The villain in the mystery novel I’m writing is an extremely evil individual, the kind of guy you would avert your eyes from if you saw him walking down the street. He’s filled with tatoos and has an extremely noticeable scar. How did I come up with him? I thought about the type of person I would be scared to speak to if I saw him in out. Someone who would frighten me by appearance alone, let alone his actions, which are much worse. Your villain can portray any type of personality you want, but try to make him or her memorable and delve into their past.