Aki
亜紀
| Aki亜紀 | |
| Hair | Ahoge, Long, Spiky Bangs, Violet |
| Eyes | Amber, Tareme |
| Body | Pale, Slim, Young-adult |
| Clothes | Corset, Glasses, Thigh-high Stockings, Uniform |
| Role | Betrothed, Twin Sister |
| Visual novels | Main character - Doop |
| Voiced by | Kaibara Elena (Advance) |