Siyoon

Billlie (Korean: 빌리; RR: Billi; stylized as Bi11lie or Billlǃə) is a South Korean girl group formed by Mystic Story. Billlie debuted on November 10, 2021, with the extended play (EP) The Billage of Perception: Chapter One. The group originally consisted of six members: Moon Sua, Suhyeon, Haram, Tsuki, Siyoon and Haruna. A seventh member, Sheon, later joined the group.