Hiyama Riko
桧山 璃子
| Hiyama Riko桧山 璃子 | |
| Measurements | Height: 150cm, Bust-Waist-Hips: 80-58-85cm |
| Hair | Blue, Long |
| Eyes | Garnet, Tareme |
| Body | Pale, Slim, Teen |
| Clothes | Loafers, Ribbon Hair Accessory, Ribbon Tie, Thigh-high Stockings |
| Personality | Modern Tsundere, Watashi |
| Role | Childhood Friend, High School Student, Kouhai, Neighbor, Non-blood-related Sister, School Archery Club Member |
| Engages in | Archery |
| Visual novels | Main character - Sakura Bitmap |
| Voiced by | Matsunaga Yuki |