| idol_id | 1889 |
| Selca owner | |
| Pop type | K-pop |
| Stage name (romanized) | Sian |
| Stage name (original) | 시안 |
| Real name (romanized) | Lee Siyeon |
| Real name (original) | 이시연 |
| Birth date | 2007-08-18 (age 17) ▲ ▼ |
| Chinese zodiac sign | 🐖 Pig |
| Western zodiac sign | ♌ Leo |
| Hometown | Gimhae |
| Height | |
| Weight | |
| Blood type | |
| Debut date | 2025 ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Fandom | Debut date | Disbandment date | Current member | |
|---|---|---|---|---|---|---|
|
Uspeer (유스피어) | WM Entertainment | Yes |