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- Official name：馬淵修司
- English name：Shuuji Mabuchi
- Chinese name：马渊修司
- Gender：Male
『Shuuji Mabuchi』
Director of the Shiro High School Men's Rhythmic Gymnastics Club. Born in Aomori.
He trains the members of Shiro High with enthusiastic and strict guidance.
He is an old friend of Shida, the director of Ao High School.
