| Full Name | Han Seung-yeon |
| Stage Name | Seungyeon |
| Native Name | 한승연 |
| Birthday | July 24, 1988 |
| Age | 37 years and 1 month old |
| Zodiac Sign | Leo |
| Birthplace | Seoul, South Korea |
| Height | 5’3″ (160 cm) |
| Weight | 94.8 lbs (43 kg) |
| Blood Type | A |
| MBTI | ISFJ/INFJ |
| Education | Tenafly High School |
| Languages | Korean, Japanese, English |
| Groups | KARA (2007-2016,2022-present) 4Tomorrow (2009) |
| Social Media | Instagram: [@thesy88] Twitter (X): [@fateflysy] |