Katsuragi Sei
葛城 晴
| Katsuragi Sei葛城 晴AB | |
| Measurements | Height: 176cm, Weight: 61kg |
| Birthday | 12 December |
| Age | 17 |
| Hair | Blond, Ponytail, Shoulder-length |
| Eyes | Blue |
| Role | High School Student, Student Council President |
| Visual novels | Main character - Parallel Panic |