Utsumi Saya
内海 沙椰
| Utsumi Saya内海 沙椰 | |
| Hair | Blue, Parted in Middle, Shoulder-length, Twin Braids, Twin Tails |
| Eyes | Violet |
| Body | Flat Chest, Kid, Pale, Slim |
| Clothes | Hairpin, Old Type School Swimsuit |
| Role | Daughter |
| Visual novels | Side character - Sister Mermaid |