Saya Yakushi

Yakushi Saya is one of the students studying in Shanhaijing Senior Secondary School who wields a Handgun. She is a member of the Chinese Alchemy Study Club. She is a genius, having already earned six degrees in elementary school, but rather than being a genius, she is known as a troublemaker who bullies and causes problems for others. Saya has been good friends with Nezusuke, the mouse she always carries with her, since they were children, and he is like family to her.