Nagumo Misaki♀

A second year student and the protagonist's senpai. She is the little sister of the student council president, Itsuki. She is in charge of general affairs in the student council and is also the mediator between the council and the Big Sky club. She has an amazing memory. Her personality is like a cat - selfish and moody. In fact, cat ears often spring up on her sprite.

[Based on Wikipedia]