| idol_id | 902 |
| Selca owner | wekimeki_sei |
| Pop type | K-pop |
| Stage name (romanized) | Sei |
| Stage name (original) | 세이 |
| Real name (romanized) | Lee Seojeong |
| Real name (original) | 이서정 |
| Birth date | 2000-01-07 (age 24) ▲ ▼ |
| Chinese zodiac sign | 🐇 Rabbit |
| Western zodiac sign | ♑ Capricorn |
| Hometown | Seoul |
| Height | 163.0cm (5'4") ▲ ▼ |
| Weight | 49.0kg (108lb) ▲ ▼ |
| Blood type | B |
| Debut date | 2017-08-08 (6 years and 8 months ago) ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Debut date | Disbandment date | Current member | |
|---|---|---|---|---|---|
|
(위키미키)
|
Fantagio | 2017-08-08 | Yes |