Before her debut, Choi appeared in BTS's "Love Yourself: Her" highlight reel as Jin's partner.

[1] In 2017, she was selected as a exclusive model of SMART School Uniforms alongside labelmate trainee Jiwon.

[2] On November 24, 2018, Choi was introduced as a member of the upcoming girl group through Mnet's reality show Insider Channel Cherry Bullet.

[5] The same year, Choi also appeared in the KakaoTV's series Jinx, along with fellow band member Bora.

[6] On September 20, 2022, Choi made her first leading role in the fantasy web series My 20th Twenty which premiered on April 21, 2023.