Sayu Hisanuma

This third-grade elementary student, recognizable by her brown pigtails and matching eyes, serves as Miuna’s inseparable best friend. Known for her impulsive nature, she frequently stirs up trouble and sparks conflicts with the local sea people. Beyond her mischievous tendencies, she also harbors a noticeable romantic interest in Kaname, adding a layer of sweetness to her otherwise troublemaking personality.