Shiguma Arakawa 阿良川志ぐま

co/character/280941/Kyoji-Arakawa) (Pupil), Maikeru Arakawa (Pupil), Koguma Arakawa (Pupil), Guriko Arakawa (Pupil), Akane Osaki (Pupil)

He was Shinta Arakawa's Master. He is one of four Shin'nuchi rank in the Arakawa School. He currently is the master of 5 pupils: Kyoji Arakawa, Maikeru Arakawa, Koguma Arakawa, Guriko Arakawa and Akane Osaki.

He is a serious person with his work, he is usually very kind to people and very strict with his students, despite that he has great affection for them.