Shizu Murasame (村雨静 Murasame Shizu?), usually addressed as "Oshizu" (お静) the O (お) is an honorific used to refer to women, is the ghost of a girl who died in the old abandoned school building 400 years ago. Since her meeting with Rito and the others, she begins exploring the world outside the old school building. Oshizu is aware of Haruna's crush on Rito by her ability to sense feelings while possessing another person and becomes very supportive towards cheering Haruna into confessing her feelings to him. Her real name is Shizu Murasame, but she likes to be called Oshizu better.