Stage Name: Siyoon
Birth Name: Kim Siyoon
Group: Billlie
Position: Rapper, Dancer
Birthday: February 16th, 2005
Zodiac Sign: Aquarius
II. Career
I. 2020–present: Billlie
She was officially revealed as a trainee under MYSTIC Rookies on February 18, 2020.
She was later announced as a member of MYSTIC Story's upcoming girl group Billie.
III. Siyoon Facts
– She attended Def Dance Academy and Millennium Dance Academy prior to becoming a trainee at Mystic Story.
– As a young child, Siyoon was featured in various TV performances and dancing videos.
– She appeared in BOYFRIEND’s ‘Love Style’ MV teaser (her audition).
– Siyoon was featured in a Reuters article about aspiring K-pop trainees in 2015.
– Siyoon passed her audition in April 2019. She became a trainee at Mystic around the same time as Haram.
– She is a regular model for Popteen, a Japanese teen fashion magazine.
– Her fandom name is Unicity. Her logo is chick popping out of an egg.
– Her nicknames are positive energy and lovely.
– Her role in the team is positive/calm action.
– Her hobbies are speaking Japanese with Haruna in her room, and diary writing.
– Her special ability is making 10 hearts.
– Her role models are IU and Blackpink’s Lisa.
– The song she sang for her audition is an Heize song.
-She would like to live like Haruna for a day because she is cute.
