| Full Name | Lee Si Yeon |
| Stage Name | Siyeon |
| Native Name | 이시연 |
| Birthday | October 1, 1995 |
| Age | 29 years and 11 months old |
| Zodiac Sign | Libra |
| Birthplace | Daegu, South Korea |
| Height | 5’6″ (166 cm) |
| Weight | 108 lbs (49 kg) |
| Blood Type | A |
| MBTI | ENTP |
| Education | Jinsun Girls’ High School |
| Languages | Korean |
| Group | Dreamcatcher |
| Social Media | Instagram: [@______s2ing] Twitter (X): [@aak_sy] |