| Full Name | Seol Yoona |
| Stage Name | Sullyoon |
| Native Name | 설윤아 |
| Birthday | January 26, 2004 |
| Age | 21 years and 4 months old |
| Zodiac Sign | Aquarius |
| Birthplace | Daejeon, South Korea |
| Height | 5’6″ (168 cm) |
| Weight | – |
| Blood Type | A |
| MBTI | ISFP |
| Education | Hanlim Multi Arts High School |
| Languages | English, Korean, Spanish |
| Group | NMIXX |
| Social Media | Spotify |