| idol_id | 942 |
| Selca owner | classy_hyungseo |
| Pop type | K-pop |
| Stage name (romanized) | Hyungseo |
| Stage name (original) | 형서 |
| Real name (romanized) | Myung Hyungseo |
| Real name (original) | 명형서 (明馨書) |
| Birth date | 2001-06-25 (age 24) ▲ ▼ |
| Chinese zodiac sign | 🐍 Snake |
| Western zodiac sign | ♋ Cancer |
| Hometown | Suwon |
| Height | 161.0cm (5'3") ▲ ▼ |
| Weight | 43.0kg (95lb) ▲ ▼ |
| Blood type | A |
| MBTI | ESFJ |
| Debut date | 2017-11-28 (7 years and 11 months ago) ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Fandom | Debut date | Disbandment date | Current member | Roles | |
|---|---|---|---|---|---|---|---|
|
CLASS:y (클라씨) | M25 | 2022-05-05 | Yes | |||
|
Busters (버스터즈) | Marbling E&M | 2017-11-28 | 2025-07-08 | Group disbanded | Main vocal |