She is a third-year high school student of Central High School. She is Yoshitake’s older sister and everyone refers to her with her surname, Tanaka. Tadakuni initially believed that she’d be rather kind but thanks to Hidenori’s insensitivity, this was proved otherwise. Yoshitake even claims that she is way crazier than he is. She is in good terms with Motoharu’s Older Sister and Tadakuni’s Little Sister. She is also shown to be concerned with not getting a boyfriend, even going so far as to pretend to be in a relationship with Yuusuke who she claims disgusts her.

She is strong and violent, being the ringleader of a group of girls who later shaved Motoharu’s beard. Despite all this, Yoshitake later realized, to his annoyance, that she is actually a well-mannered person whenever she is alone.