Mei is the older cousin of Yomi. She is cool, powerful and is a freelance exorcist. Mei likes calming devil spirits by herself and her weapon is a beautiful spear. She is a bit jealous of Yomi who will be the next head of Isayama family, but she does not show her true feelings to anyone. Mei's father is Isayama Yuu. (Appears in Ga-Rei: Zero Anime only)