Although Ritsuko (Rit-chan) is a gentle natured high school student, she is also a huge weapon otaku. Her favorite toy is a JSDF Type 74 tank, which she uses to help the group out of dangerous situations (where did she learn to use a tank?!!). Very discrete and rather shy, she rather likes the company of Junpei (probably because he is as tough and dumb as her tank?) and loves cakes and other sweets. She has long red hair, wears a high school uniform and often uses a walkie-talkie headphone set to stay in touch with the others.