The school nurse at Fujimi High School, she is rather ditsy as compared to the rest of girls in the group. Her large bust size is often used as a comical element in the story. A 26 year old bachelorette she lives with Rika Minami, a sniper of Japan’s Special Assault Team. Her home was used as a safe haven for the group once they escaped the high school. As a nurse she is responsible for the health and care of everyone in the group and is efficient at doing so.
Despite being the only adult in the group, she is emotionally fragile and doesn’t know what will become of her life since the Outbreak started. Like the rest of the main characters, Shizuka worries that she will never see her family or friends again.