Also known as: Kim Siyoon · Kim Shi Yoon · Kim Shi-yoon · 김시윤 · Billlie · Kim Si-yoon
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.
