Seonyou

Prior to becoming an idol trainee, Seonyou was a figure skater who competed in various figure skating competitions. On September 21, 2020, Seonyou was announced as a contestant in the 2020 teen competition show CAP-TEEN. She did not pass the first performance evaluation and thus was eliminated.

On September 8, Seonyou was featured in the trailer for the show My Teenage Girl, confirming her participation. On the finale, she ranked 2nd overall, making her a member of the girl group CLASS:y. They debuted on May 5, 2022 with the mini album Class Is Over.