Mitarai Onko
御手洗 音子
| Mitarai Onko御手洗 音子AB | |
| Measurements | Height: 160cm, Weight: 45kg, Bust-Waist-Hips: 78-60-80cm |
| Birthday | 13 June |
| Hair | Ahoge, Curtained, Parted to Side, Shoulder-length, Spiky Bun, White |
| Eyes | Garnet |
| Body | Pale, Slim |
| Clothes | Coke-bottle Glasses, Corset, Hair Tie, Hairpin, Pleated Skirt, School Uniform, Shimapan, String Ribbon Tie |
| Role | Student |
| Subject of | Pregnancy |
| Visual novels | Main character - Hitorijime! ~Mama mo Shimai mo Otonari-san mo~ |
| Voiced by | Shiroi Usagi |