| idol_id | 893 |
| Selca owner | gugudan_sejeong |
| Pop type | K-pop |
| Stage name (romanized) | Sejeong |
| Stage name (original) | 세정 |
| Real name (romanized) | Kim Sejeong |
| Real name (original) | 김세정 (金世正) |
| Birth date | 1996-08-28 (age 28) ▲ ▼ |
| Chinese zodiac sign | 🐀 Rat |
| Western zodiac sign | ♍ Virgo |
| Hometown | Gimje |
| Height | 164.0cm (5'5") ▲ ▼ |
| Weight | 48.0kg (106lb) ▲ ▼ |
| Blood type | AB |
| Debut date | 2016-05-04 (8 years and 8 months ago) ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Debut date | Disbandment date | Current member | Roles | |
|---|---|---|---|---|---|---|
|
(구구단)
|
Jellyfish Entertainment | 2016-06-28 | Yes | Center | |
|
(아이오아이)
|
YMC Entertainment, CJ E&M | 2016-05-04 | 2017-01-31 | Group disbanded |
| Name | Debut date | |
|---|---|---|
|
(구구단 세미나)
|
2018-07-10 |