Park Cho-a

Choa was born on March 6, 1990, in Incheon, South Korea. She wanted to major in music at university but her conservative father wanted her to get a traditional job, so she enrolled in Aviation Business Administration in Inha Technical College. She also worked as an IPTV salesperson, where she secretly auditioned to be an idol, failing the audition at SM Entertainment 15 times.

Choa's first step in becoming an idol was when she met singer-songwriter Juniel, who told her about FNC's auditions for their girl group, AOA. Both Juniel and Choa were previously trainees at a company that went bankrupt.