南 千秋

Chiaki is the youngest sister in elementary school. She is in class 5-2 (a reference to Kyo no Gononi). Her apparent high intelligence often makes her over****yse simple stuff. She also tends to ignore idiotic behaviour displayed by Kana and Makoto. Even being the youngest, she is the meanest out of the three; most of the time, she is quiet during group activities, and almost always uses the word "bakayarō", which is a more forceful form for "idiot" in Japanese ("baka" being the less forceful term).