Hashino Sumi
橋野 須美
| Hashino Sumi橋野 須美 | |
| Aliases | Lord of the Archive, Shoko no Omo, 書庫の主 |
| Hair | Short, Spiky Bangs, Violet |
| Eyes | Amber, Tareme |
| Body | Pale, Slim, Teen |
| Clothes | Ribbon Tie, School Uniform, Skirt, Sundress |
| Items | Book |
| Personality | Antisocial, Bookworm, Mysterious, Old-fashioned, Taciturn |
| Role | High School Student |
| Subject of | Bullying, Psychological Trauma |
| Visual novels | Main character - Aa, Ojou-sama |
| Voiced by | Imuraya Honoka |