Sayu Hisanuma

Оригінальне ім’я: 久沼さゆ

A third grade elementary school girl with brown haired pigtails and eyes. She is Miuna's best friend who often instigates confrontations with sea people. She appears to have a crush on Kaname. ~! After the timeskip, she entered the same middle school as Hikari and the others. She also decided to be more serious at studying and becoming independent. !~