Risako

On July 7, 2021, Risako was confirmed as a contestant on Mnet's reality show, Girls Planet 999, along with the other participating trainees, through the prologue trailer. Her official profile was released on July 19. In the eighth episode, which was aired on September 24, it was revealed that Risako was unfortunately eliminated with her final rank being J15.

On November 25, 2024, she was announced as the first member of UDTT. The group made their debut on April 29, 2025 with the single album "School Rush".