Sudou Yumi
須藤 由美
| Sudou Yumi須藤 由美 | |
| Measurements | Height: 148cm, Weight: 36kg, Bust-Waist-Hips: 72-55-79cm |
| Hair | Red, Shoulder-length, Thick Eyebrows |
| Eyes | Black |
| Body | Small Breast Sizes |
| Clothes | Armband, Glasses, Name Tag, School Uniform |
| Role | Discipline Committee Member, Student |
| Visual novels | Side character - Ayumi-chan Labo |
| Voiced by | Mizuki Mirai |