Billlie · Profile
Siyoon
Siyoon is a South Korean member of Billlie, a girl group under Mystic Story that debuted on November 10, 2021. She was among the original six members at launch, having previously competed on the talent show K-pop Star 5 and worked as a model for Popteen magazine. In April 2025, she and fellow member Moon Sua formed Billlie's first sub-unit, releasing the single "Snap" featuring Sokodomo. The group's first studio album, The Collective Soul and Unconscious: Chapter Two, followed in May 2026.
Official Video
Group
Groupmates
Billlie →Discography
Billlie →| Release | Album |
|---|---|
| 2026-05 | The Collective Soul and Unconscious: Chapter Two |
| 2026-01 | cloud palace ~ false awakening |
| 2025-05 | The Savior (Dead Mansion X Billlie) (Original Webtoon Soundtrack) [Japanese Version] |
| 2025-02 | The Savior (Dead Mansion X Billlie) [Original Webtoon Soundtrack] |
| 2024-10 | Of All We Have Lost |
| 2024-10 | Appendix: Of All We Have Lost · Remembrance Candy |
Latest News
All news →Frequently Asked Questions
What group is Siyoon in?
Siyoon is a member of Billlie.
What is Siyoon's nationality?
Siyoon's nationality is South Korean.