Kim Si-yoon
February 16, 2005 (21 years old) in Seoul, South Korea
Kim Si-yoon, known mononymously as Siyoon, is a South Korean rapper, singer and lyricist under MYSTIC STORY. She is a member of the girl group Billlie and its sub-unit Moon Sua X Siyoon.
Known For
Credits
- 2025 · KPOPPED as Self
- 2022 · the interlude of 11 as
- 2022 · Idol's Physical Race as Self
- 2020 · The Silence Of IDOL as Siyoon
- Future · Perfect Girl as