Mondenbuchi Daigo
門田淵 大吾
| Mondenbuchi Daigo門田淵 大吾 | |
| Aliases | Steel Daigo, Hagane no Daigo, ハガネの大吾 |
| Hair | Brown, No Bangs, Short, Spiky |
| Eyes | Itome |
| Body | Adult, Muscular, Olive |
| Clothes | Headband, Necklace, Swim Shorts, T-shirt |
| Personality | Kind, Strange |
| Role | Teacher |
| Engages in (Sexual) | Not Sexually Involved |
| Visual novels | Side character - Hanairo Heptagram |
| Voiced by | J-Ichirou |