Zoe

In October of 2017, Zoe (then known by her Korean name Choi Hayoung) became a contestant on the survival show MIXNINE, where she represented Polaris Entertainment. She was later on eliminated, ranking 39th place. On March 14, 2018, she was revealed as the first member of Polaris Entertainment's trainee team Polaris Junior.

However, the trainee team became inactive shortly after in April 2018. On December 21, 2023, Zoe was revealed as a member of the upcoming girl group Geenius. They debuted on January 5, 2024 with the single album "Voyage".