| Full Name | Jeong Yoonchae |
| Stage Name | Yoonchae |
| Native Name | ì •ìœ¤ì±„ |
| Birthday | December 6, 2007 |
| Age | 17 years and 6 months old |
| Zodiac Sign | Sagittarius |
| Birthplace | Seoul, South Korea |
| Height | 5’7″ (170 cm) |
| Weight | – |
| Blood Type | – |
| MBTI | ISTP |
| Education | – |
| Languages | Korean, English |
| Group | KATSEYE |
| Social Media | Instagram: [@y0on_cha3] |