Miller the Killer was the first person Rafe Khatchadorian met at his school. He told Rafe that most of the seats in the homeroom were his.
Miller is huge with blonde or orange hair and tattoos. He is always seen in a sweatshirt, t-shirt, jeans, and sneakers. In one of Rafe's drawings he has a detective coat and fedora. He is sometimes seen with the Operation R.A.F.E. notebook.
- Rafe makes Miller a nickname: "Miller the Chicken Killer"
- Miller has tattoos