Takaya Yuina
高谷 唯依菜
| Takaya Yuina高谷 唯依菜 | |
| Aliases | Naiyu, ナイユ |
| Hair | Brown, Long, Parted in Middle, Spiky Bangs, Twin Tails |
| Eyes | Brown, Tsurime |
| Body | Medium Breasts, Pale, Slim, Teen |
| Clothes | Choker, Knee-high Socks, Miniskirt, Old Type School Swimsuit, Pajamas, Sailor School Uniform |
| Items | Stuffed Toy |
| Personality | Brother Complex, Childishly Violent, Tsundere, Watashi |
| Role | Domestic Partner, Full Sister, Student, Younger Sister |
| Visual novels | Main character - Sweet Room ~Futari Dake no Himitsu no Amai Kuukan~ |
| Voiced by | Serizono Miya |