Torako Koshi (虎視 虎子, Koshi Torako), or simply Koshitan (こしたん), is the president of the student council and the Deer Club, and the former class representative of 2-B at Hino Minami High School. She is the classmate, best friend, and clubmate of Nokotan Shikanoko, and the older sister, schoolmate, and clubmate of Koshi Anko. Formerly a delinquent leader, Koshitan has cleaned up her act and instead become known as a respected and admired Class Princess and an honors student of good character.