Kosonezaki Suuko
小曽根崎 すぅ子
| Kosonezaki Suuko小曽根崎 すぅ子O | |
| Measurements | Height: 161cm, Weight: 49kg |
| Birthday | 11 July |
| Hair | Hime Cut, Long, No Bangs, Sidehair, Violet, Waist Length+ |
| Eyes | Red |
| Body | Pale, Slim, Teen |
| Clothes | Baseball Cap, Blazer, Ribbon Tie, School Uniform, Shirt, Trousers |
| Personality | Carefree, Funny |
| Role | Classmate, Student |
| Visual novels | Side character - Jiritsu Kidou Sensha Izuna |
| Voiced by | Shindou Naomi |