Shima Sumitomo

After a fall-out with her friends from her last school, she is eager to make new ones when moving in with her biological father. She is also terrified of being hated by her female peers and is initially reluctant to becoming friends with Wao and Gen.

Though silly, seemingly air-headed, and clumsy, Shima is very aware of her role in her family and friend's lives. She makes several self-sacrificing decisions and often puts other people's happiness above her own.