Little Garden's Hospital
Hayato Kisaragi (brother)
Karen Kisaragi is Hayato's younger sister who is ill. Hayato became a Slayer in order to obtain first-class treatment for her. While staying in the hospital she is often seen playing tarot cards, where she has become sort of a clairvoyant. Unlike her brother, Hayato, she already knew that Emilia is a girl the moment she met her.