| Full Name | Jang Ye-eun |
| Stage Name | J |
| Native Name | 장예은 |
| Birthday | December 9, 2004 |
| Age | 20 years and 6 months old |
| Zodiac Sign | Sagittarius |
| Birthplace | Yongun-dong, Dong-gu, Daejeon, Chungcheong, South Korea |
| Height | 5’7″ (170 cm) |
| Weight | 105.8 lbs (48 kg) |
| Blood Type | – |
| MBTI | INFJ |
| Education | Hongik University Girls’ High School |
| Languages | Korean, English, Japanese |
| Group | STAYC (2020-present) |
| Social Media | Instagram: [@jang.j_2] |