Kousaka Miki
向坂 海希
| Kousaka Miki向坂 海希O | |
| Measurements | Height: 161cm, Bust-Waist-Hips: 86-59-88cm, D cup |
| Birthday | 14 October |
| Hair | Black, Ponytail |
| Eyes | Blue, Tareme |
| Body | Pale, Slim, Teen |
| Clothes | Apron, Bikini, Bracelet, Ribbon Hair Tie, Ribbon Tie, School Uniform, Yukata |
| Personality | Cheerful, Friendly, Kind, Naive |
| Role | Childhood Friend, Friend, Girlfriend |
| Visual novels | Main character - Aonatsu Line |
| Voiced by | Kotorii Yuuka |