大上 律子

Ritsuko is one of the childhood friends of Takumi and has the role of a ''Supervisor'' in the Student Council and is a member of music club. She's the oldest of the group and, in order to protect and take care of her friends, Ritsuko decided to become stronger and reliable. She's very stubborn and doesn't change her mind so easily. She likes to tease Takumi just for fun but in reality she actually admires him.