Kochou is one of Kousaku Hata's classmates and one of the "Shitennou" aka "Four Heavenly Farmers". Her title is "Boin Yoshida" and she majors in animal husbandry. Unfortunately, her title "Boin Yoshida" often leads Hata to call her "Boobies" aside from the fact that she has a large bust size. It is hinted that she has feelings for Kei. She has such a high esteem for herself that she calls everyone vulgarians.