Yoon Sooin

On July 13, 2023, Sooin was introduced as a contestant on the SBS survival show Universe Ticket. Unfortunately, she was eliminated during the second round and was unable to move on. On September 7, 2025, Sooin was introduced as a contestant on Mnet's survival show Unpretty Rapstar: HIP POP Princess.

She was eliminated during the show's eighth episode. On January 30, 2026, it was announced that she has signed with Blue Brown Records and is a member of their first girl group (later revealed to be called Heart Of Woman) which is expected to debut in the first half of the year.