Kep1er

Kep1er ( ; Korean: 케플러) is a South Korean girl group formed by CJ ENM through the Mnet reality competition show Girls Planet 999 in 2021. The group consists of six members: Kim Chae-hyun, Huening Bahiyyih, Choi Yu-jin, Kim Da-yeon, Ezaki Hikaru, and Shen Xiaoting. Originally a nine-piece ensemble, former members Kang Ye-seo and Sakamoto Mashiro departed from the group in July 2024, and Seo Young-eun departed in March 2026. The group debuted on January 3, 2022, under the co-management of WakeOne and Swing Entertainment with their first extended play (EP) First Impact.