Bae Soo Min (Hangul: 배수민), also known simply by her first name Sumin (Hangul: 수민), is a South Korean singer currently under High Up Entertainment. She is the leader of the girl group STAYC.
2020: Debut with STAYC
On September 9, 2020, Sumin was revealed as the second member of STAYC. Her prologue film was released on October 15. The group debuted on November 12 with their first single album “Star To A Young Culture”.
Source: stayc fandom