The former treasurer of the Millennium Academy Student Council, "Seminar". She is strict about money and often quarrels with other club activities from her standpoint. While still in school, she is a prominent mathematical genius even amongst Millennium's STEM-rich student base, she supervises the budget management of the Millennium. She is good at the abacus and has a habit of counting it to compose herself when faced with complex and troubling matters. Now, she is a housewife.