Tsutsuji Shibasaki

Roka's little sister. She goes to Higashi-Fuge High due to failed exams in Fujou High. She shows strong affection and over protectiveness to Roka, even to the point of comeing to Fujou just to threat Kenji due her jealousy, because Roka often mentiones Kenji in her conversation. Roka's bentos are always made by Tsutsuji.