| Full Name | Shim Ja-yoon |
| Stage Name | Yoon |
| Native Name | 심자윤 |
| Birthday | April 14, 2004 |
| Age | 21 years and 2 months old |
| Zodiac Sign | Aries |
| Birthplace | Dosan-dong, Gwangsan-gu, Gwangju, South Korea |
| Height | 5’8″ (173 cm) |
| Weight | 108 lbs (49 kg) |
| Blood Type | A |
| MBTI | ENFP |
| Education | Gajaeul High School |
| Languages | Korean, English, Japanese |
| Group | STAYC (2020-present) |
| Social Media | Instagram: [@yoon_nxxy] |