HeeJin (Jeon Hee-jin, born 1998) is a South Korean singer and lyricist who made history in 2016 as the first member revealed for LOONA, a group that built one of K-pop's most dedicated fanbases through its elaborate pre-debut project. After winning a contract termination lawsuit against BlockBerryCreative in January 2023, she signed with Modhaus and joined ARTMS - a five-member group of former LOONA members that debuted in May 2024 with the album *Dall*. Alongside her group work, she released the solo EP *K* in October 2023 and the rock single 'sAvioR' in November 2025.
HeeJin released the rock single 'sAvioR' (stylized as 'sAvioR') on November 13, 2025, accompanied by a music video.
ARTMS released the mini-album *Club Icarus* in June 2025, featuring the title single 'Icarus'.
ARTMS performed on May 3, 2025 at the Effenaar in Eindhoven as the only Benelux stop of their world tour 'Lunar Theory'.
ARTMS started their second world tour 'Lunar Theory' on March 22, 2025 in Seoul, followed by shows in North America and Europe.
ARTMS debuted on May 31, 2024 with the studio album *Dall*, which sold more than 120,000 copies in its first sales week and topped the Billboard Top New Artist Albums chart.
