Harukaze Kotori

Classmate of the twins. 3rd year high school student.
Despite her large bust she has a modest personality.
An idol like person who is kind to everyone. Has been friends with Yoshino since Junior High School. She is said to be the “heart of Seishun-bu” organizer in the shadows.
She is scary when angered.
She isn’t good at talking to boys, and her face becomes red.