Nintai Yasumu is a 18 years old woman that is a guardian called "Freezing Guardian", she protects the city from an evil organization called "Undead End" that steals peoples souls and fills people with negative energy and turns people into monsters, but when a "Guardian" purifies a person, the person soul returns to the body. Nintai is very serious. Nintai can manipulate time. Nintai has a Guardian Wand to purify monsters. Nintai best friend is Kumo Akarui.