![Sayu Hisanuma](https://cdn.noitatnemucod.net/thumbnail/400x400/100/39aa95c2fca69ae3434465a0ea896c59.jpg)
Sayu Hisanuma
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.
After the time-skip, she entered the same middle school as Hikari and the others. She also decided to be more serious at studying and becoming independent.
She has a crush on Kaname.
After the time-skip, she entered the same middle school as Hikari and the others. She also decided to be more serious at studying and becoming independent.
She has a crush on Kaname.
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A Lull in the Sea
Main (Role) TV
![Ishihara, Kaori](https://cdn.noitatnemucod.net/thumbnail/100x100/100/e8ca2dab5b97512c2235b049381446b1.jpg)
Ishihara, Kaori
Japanese![Williams, Sarah](https://cdn.noitatnemucod.net/thumbnail/100x100/100/e5acd389090b884252811dbbf881d90f.jpg)