Masako Araki

Birthday: January 3 / Age: 33

Coach of the Yōsen High School basketball team. A female physical education teacher. Former member of the Japan women's national basketball team, with jersey number 8 during her active years. She used to be a delinquent.

A black-haired woman who wears a pantsuit and is considered beautiful by Murasakibara. Usually calm and composed, but strict with her team members, sometimes getting unreasonably angry and disciplining them with a bamboo sword.

She has a sense of discomfort around Harasawa and claims to have had some past incidents with Takeuchi from Kaijō and Kagetora.