Son Hye Ju, formerly known as Olivia Hye, is a South Korean singer, dancer, former member of LOONA (이달의 소녀) and current member of LOOSSEMBLE (루셈블). She attended Sungshin Girls’ High School but dropped out and later passed the High School Graduation Qualification Examination.

In October 2016, Blockberry Creative (블록베리크리에이티브) decided to debut a girl group through an 18-month long pre-debut project. She was the 12th member to be revealed and released her single "Egoist" in March 2018. After 4 members were revealed, she formed the sub-unit LOONA yyxy with them and released the EP "Beauty & the Beat" in May 2018.

She officially debuted in August 2018 as the group's rapper, dancer and vocalist with their first EP, "[+ +]".

In November 2022, member Chuu was removed from the group after winning a partial injunction against the agency to terminate her contract. The company blamed Chuu and cited an abuse of power as the cause for her removal. However, the remaining members filed an injunction to terminate their contracts three days after Chuu was removed. The agency even teased a comeback scheduled for January 2023 which was promptly boycotted by the fans and postponed indefinitely. In June 2023, her injunction was granted, and she left the company.

She signed with CTDENM (씨티디이엔엠) and re-debuted in September 2023 as LOOSEMBLE's rapper, dancer and vocalist with their first EP, also titled "Loossemble".

On November 29, 2024, CTDENM announced that their exclusive contracts with the Loossemble members had ended.

(Source: kisskh) Edit Biography