| Full Name | Seo Young-eun |
| Stage Name | Youngeun |
| Native Name | 서영은 |
| Birthday | December 27, 2004 |
| Age | 20 years and 5 months old |
| Zodiac Sign | Capricorn |
| Birthplace | Uijeongbu, Gyeonggi-do, South Korea |
| Height | 5’2″ (158 cm) |
| Weight | 92.6 lbs (42 kg) |
| Blood Type | A |
| MBTI | INFP |
| Education | ModernK Music Academy |
| Languages | Korean, Japanese, English |
| Group | Kep1er |
| Social Media | – |