| Full Name | Oh Hae-won |
| Stage Name | Haewon |
| Native Name | 오해원 |
| Birthday | February 25, 2003 |
| Age | 22 years and 3 months old |
| Zodiac Sign | Pisces |
| Birthplace | Incheon, South Korea |
| Height | 5’4″ (163 cm) |
| Weight | – |
| Blood Type | – |
| MBTI | ISTP |
| Education | Doonchon High School |
| Languages | Korean, English, Spanish |
| Group | NMIXX |
| Social Media | – |