2016–2020: Gugudan In June 2016, Jo was introduced by her mononymous real name, Hyeyeon, as the maknae line of Jellyfish Entertainment's upcoming girl group. The group, Gugudan, debuted on June 28, 2016 with a mermaid concept in EP Act. 1 The Little Mermaid. In July 2017, Jellyfish Entertainment announced that Jo will debut in a subunit with Kang Mi-na as Gugudan 5959 (; spelled as "Ogu-ogu") with the release of a single titled "Ice Chu" on August 10. On May 17, 2018, it was announced that Jo would go on a temporary hiatus from all Gugudan's activities due to health issues, then departed from the group to focus on her study and health in October 2018. 2022–present: Acting debut After her contract expirations with Jellyfish Entertainment in 2021, Jo signed contract with to pursue her acting career as Jo Aram. In 2022, she debuted as an actress in ''The Killer's Shopping List'' where she played a 7-years experienced part-time worker. In 2023, she starred in JTBC's Doctor Cha as Jeon So-ra, a third year surgical resident with an intelligent appearance, urban vibe, tough personality, and strong work ethic. The role gave her recognition from the public and earned her two Best New Actress awards that year. During the same year, she was cast as one of the lead role in KBS Drama Special 2023: Overlap Knife, Knife. == Discography ==