Aiba Matsuri

The protagonist's classmate and mischievous friend.
She is a cheerful and spirited girl who can makes friends with anyone, but she is a natural prankster that often get into a bad mood.
She is not treated like a girl due to her noisy nature and tendency to make crude jokes. She is outwardly cheerful and yet naive on the inside.
She has feeling for the protagonist deep down, and wants to be seen as a girl despite her thinking otherwise.