Coco

Sometime in March 2020, Coco was revealed as the new fourth member of KAACHI through released behind the scenes images of filming their music video. She made her debut as the official fourth member of the girl group on April 15, 2020 with their debut digital single "Your Turn". On August 2, 2022, it was announced that Coco decided to leave the group.

KAACHI later disbanded in February 2023. Despite the disbandment of KAACHI, Coco and members Nicole and Chunseo decided to remain working alongside each other; they eventually formed their own independent three-member girl group, ATTI, which they officially revealed in March 2023.