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

KPOPPED
2025
The Silence Of IDOL
2021
Idol's Physical Race
2023
Perfect Girl
the interlude of 11
2022
Elena

FILMOGRAPHY

All
Movies
TV
Acting
6
2025
KPOPPED
as Self
2023
Idol's Physical Race
as Self
2022
the interlude of 11
2021
The Silence Of IDOL
as Siyoon
Perfect Girl
Elena