Siyoon

Biography

Kim Si-yoon is a South Korean singer and rapper managed by MYSTIC Story. She was officially revealed as a trainee under MYSTIC Rookies on February 18, 2020. Now, she is a member of the girl group Billlie.

Movies & TV Shows

1. KPOPPED (2025) — Self
2. the interlude of 11 (2022)
3. Perfect Girl
4. Idol's Physical Race (2022) — Self