Son Hye-ju (; born November 13, 2001), known mononymously as Hyeju and formerly as Olivia Hye (), is a South Korean singer. She debuted as the twelfth and final member of the South Korean girl group Loona and later as a member of its sub-unit Loona yyxy. She was also a member of the k-pop girl group Loossemble.
Early life Son Hye-ju was born on November 13, 2001, in Sillim-dong, Seoul, South Korea, and from a young age aspired to become a singer. After attending Chungshin Girls' High School alongside another Loona member Choerry, she left to train at the FNC Academy before joining Blockberry Creative.
Career 2018–2022: Debut with Loona and yyxy and legal disputes
Hyeju was selected as the twelfth and final member of Loona in early 2018 after a short training period of one day at Blockberry Creative. She was revealed under the stage name Olivia Hye on March 17 and released her debut self-titled single album on March 30 with the main track "Egoist".
On May 30 at that same year, she was introduced as a member of Loona's third sub-unit, Loona yyxy, which released the EP Beauty & the Beat and its title track "love4eva" featuring Grimes. She made her official debut with the full Loona group on August 20, 2018, with the EP [+ +] and the title track "Hi High".
On March 1, 2022, Hyeju released a remake of the song "I'll Be Your Spring ()" by Airman and Godak.
On November 28, JTBC Entertainment News reported that nine members of Loona, including Hyeju, had filed an application for a provisional injunction to suspend their exclusive contract with Blockberry Creative, following member Chuu's expulsion three days earlier. On June 16, the Seoul High Court ruled in Hyeju's favor, suspending her contract with Blockberry Creative.
2023–present: CTDENM and debut with Loossemble
On July 5, 2023, Hyeju signed an exclusive contract with CTDENM. The agency announced she would promote under her birth name, Hyeju, moving forward. On August 2, she was revealed as a member of Loossemble along with Loona members Hyunjin, Yeojin, Vivi, and Go Won. Loossemble debuted on September 15 with their self-titled EP. On November 29, 2024, CTDENM announced that the Loossemble members' exclusive contracts with the label had ended.
On April 17, 2025, the Seoul Northern District Court officially terminated Hyeju's exclusive contract with Blockberry Creative.
Personal life On December 4, 2024, Hyeju attended a protest rally at the National Assembly demanding the impeachment of President Yoon Suk Yeol. She expressed her solidarity, stating, "Some people might feel uncomfortable that I'm voicing my opinion about this, but I am a citizen of this country before I am an idol, so I think this is the right thing to do. Let's be strong!"
Discography
Singles + List of singles as lead artist, showing year released, selected chart positions, and name of the album Title Year Peak chart positions Album US WorldBillboard World Digital Chart: "Egoist" 2018 9 Olivia Hye "I'll Be Your Spring" 2022 —
Songwriting credits All credits are adapted from the Korea Music Copyright Association. Title Year Artist Album "Real world" 2023 Loossemble Loossemble "Girls' Night" 2024 One of a Kind "Secret Diary" TTYL
Filmography
Year Title Role 2021 The Fishermen and the City (Season 3) Herself (Episodes 10–11) 2022 Girl's Re:Verse Contestant (as Chonky Cat)
Notes
References