Tamaki Yuuhi
珠木 優灯
Safe / Tame (14)| Tamaki Yuuhi珠木 優灯 | |
| Hair | Black,Blunt Bangs,Long,Straight |
| Eyes | Blue |
| Body | Pale,Slim,Teen |
| Clothes | Ankle-Strap Shoes,Blouse,Miniskirt,Pleated Skirt |
| Personality | Genius |
| Role | Older Sister,Scientist |
| Subject of | Death |
| Visual novels | Side character -Missing-X-Link ~Ten no Yurikago, Togi no Hana~ |
| Voiced by | Kusuhara Yui |