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.
Place of Birth：Gwangmyeong, Gyeonggi-do, South Korea
Also Known As：Siyoon·Kim Siyoon· Kim Shi Yoon· Kim Shi-yoon·김시윤·
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.
