|Yoshitake's older sister|
|Family:||Yoshitake (younger brother)|
|Occupation(s):||High school student (third-year)|
|Affiliation(s):||Sanada Central High|
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Yoshitake's older sister is a student at Sanada Central High. Her younger brother is Yoshitake Tanaka.
Yoshitake's older sister is slim and of average height. She has short brown hair kept in place with a yellow hair clip. Like the other sisters, her eyes are never depicted.
The faceless, short-haired sister of Yoshitake who does not get along with her brother. Strong and violent, she is the ringleader of the girls who shave off Motoharu's beard. She is also highly concerned about not getting a boyfriend. She seems to have a crush on Hidenori's older brother, Yūsuke, who calls her "Tanaka", although it is later revealed she only wanted to date him in desperation of finding a boyfriend, claiming she could not imagine kissing him.