| idol_id | 844 |
| Selca owner | wjsn_eunseo |
| Pop type | K-pop |
| Stage name (romanized) | Eunseo |
| Stage name (original) | 은서 |
| Real name (romanized) | Son Jooyeon |
| Real name (original) | 손주연 (孫周延) |
| Birth date | 1998-05-27 (age 26) ▲ ▼ |
| Chinese zodiac sign | 🐅 Tiger |
| Western zodiac sign | ♊ Gemini |
| Hometown | Incheon |
| Height | 172.0cm (5'8") ▲ ▼ |
| Weight | 48.0kg (106lb) ▲ ▼ |
| Blood type | B |
| MBTI | ENFJ |
| Debut date | 2016-02-25 (8 years and 10 months ago) ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Fandom | Debut date | Disbandment date | Current member | |
|---|---|---|---|---|---|---|
|
Cosmic Girls (우주소녀 (宇宙少女)) | Starship Entertainment, Yuehua Entertainment | 2016-02-25 | Yes |
| Name | Debut date | |
|---|---|---|
|
WJSN The Black (우주소녀 더 블랙) | 2021-05-12 |