Relationships[]
Shiguma School:
- Akane Osaki: When they met he refused to teach her because he didn't want to make her give up rakugo. After a while when Akane was interested in entering the Karaku cup, she came to his aid to interpret jugemu, Koguma agreed to help her and showed her the basics of it. Due to her performance in the Karaku Cup, Koguma recognized her and called her sister thus showing his respect towards her. Currently, Koguma likes Akane and considers her like a younger sister, so he tries to improve her skills so that she can be proud of him.
- Shiguma Arakawa: He has great respect for his teacher.
- Maikeru Arakawa: Maikeru and Koguma are great friends, they both respect each other and although Maikeru often calls him nicknames, Koguma respects him for his abilities. Some time ago, Koguma admitted to being jealous of Maikeru because he used to do what he wanted and people still loved him.
- Kyoji Arakawa: They both respect each other, although Koguma is his superior, he is not usually rude to him.
- Guriko Arakawa: Koguma takes care of Guriko as he is the youngest member of the school (until Akane's arrival), Koguma considers Guriko as a younger brother and regrets when he cannot help him by showing his affection towards him.
Others Rakugo Schools:
- Hakushu Kashiwaya: Friend of Kyoji and Koguma, both often make presentations together and usually talk often.
Others:
- Shinta Arakawa: Upon entering Shiguma's school, Koguma was the youngest pupil at the time so Shinta was one of his mentors. Koguma used to spend time with Shinta as they both used to talk about old stories. Shinta would become the reason why Koguma would set out to study hard and change his appearance and personality on stage.