Airi Nagase

Airi is a first-year student and the treasurer of the student council. Because of a traumatic experience in her past, which turned in fear, Airi is very cold towards men. She is said to be a tsundere because of her difference in treatment between men and women. It is revelead later that she loves and writes yuri novels, which often makes Keiki wonder if she is homosexual.

(Source: Wikipedia)