| Full Name | Lee Hee-seung |
| Stage Name | Heeseung |
| Native Name | 이희승 |
| Birthday | October 15, 2001 |
| Age | 23 years and 7 months old |
| Zodiac Sign | Libra |
| Birthplace | Namyangju, Gyeonggi, South Korea |
| Height | 6′ (183 cm) |
| Weight | 141.1 lbs (64 kg) |
| Blood Type | A |
| MBTI | ISTP |
| Education | Gwangnam High School |
| Languages | Korean, English |
| Group | ENHYPEN |
| Social Media | weverse |