Wataya Mio
綿谷 美桜
| Wataya Mio綿谷 美桜 | |
| Measurements | Height: 151cm, Weight: 42kg, Bust-Waist-Hips: 77-57-80cm, B cup |
| Hair | Long, Side Tail, Violet |
| Eyes | Amber |
| Body | Pale, Slim |
| Clothes | Hairpin, School Uniform, Swimsuit |
| Personality | Assertive, Curious, Desu, Hard Worker, Kind |
| Role | Step Sister |
| Subject of | Pregnancy |
| Visual novels | Main character - Onii-chan Daisuki! |
| Voiced by | Karasuma Sora |
DescriptionThe step sister of the protagonist and Rio. Her mother married their father. | |