Kang Ye Seo is a South Korean actress and singer managed by 143 Entertainment. She debuted in MBC’s 2010 series, Golden Fish. She was a member of a kid girl group CutieL until disbanding in 2017. Kang is a former member of girl group Busters, which she joined in 2019 and officially left in July 2020. In 2021, she joined Mnet’s idol program Girls Planet 999 with a fellow labelmate Sakamoto Mashiro. She placed 6th in the program and debuted in the name of Kep1er.