Character profile
Sayu Hisanuma
久沼さゆBiography
Sayu Hisanuma is a third-grade elementary school girl and Miuna's best friend. She often instigates confrontations with people from the sea and appears to have a crush on Kaname.
Story spoilers
After the time skip, Sayu enters the same middle school as Hikari and the others and decides to take studying and independence more seriously.
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