Mari Tomita  

Tom-Chan-Sensei, 富田毬

Ton-chan is a young and attractive homeroom teacher at Higashi Junior High School, who is often the subject of fantasies among junior high school students. Known as Ton-chan by many, she has become involved in Kogarasumaru's adventures as an AT-team member. Despite being a former student of the school and being constantly reprimanded by Orihara Masaya, her former teacher and academic head, Ton-chan is always on high alert, fearing that someone might harm her. She owns a small car which the team used to travel together, including their first meeting with Akito/Agito during a battle.