A third-year student at Koiniochiru Girls’ High School. Yatsumi is a very popular solo idol, and is adored by the entire school. She tends to speak in casual slang and wears makeup to match her mood. She can be somewhat sharp-tongued at times, but is usually a fairly outgoing girl. Yatsumi’s social status makes her seem intimidating; she’s actually well-aware of this. Yatsumi tries to get along with everyone as equals.
She is in love with her childhood friend, Iha Muneyaki. She tends to get very obsessive over Iha, and it’s been implied several times that she would kill someone for her. This makes Yatsumi a “yandere”. She doesn’t want anyone else near Iha...