Siyoon
Billlie
4th Gen (commonly-cited era, approximate)Verified facts
Real nameKim Siyoon
Birthdate2005-02-16
Group debut2021-11-10
Group size7 members
Stats — real computed numbers, never invented ratings
All facts are sourced from public profiles/Wikipedia and verified before being added. Age and years active are computed from today's date, not a fixed snapshot.