Olivia Hye (Hangul: 올리비아 혜) is the twelfth and last revealed member of LOOΠΔ and a member of its third sub-unit, LOOΠΔ / yyxy. She was born as Son Hye Joo (Hangul: 손혜주) on November 13, 2001 in Uijeongbu, Gyeonggi Province, South Korea. She debuted on March 17, 2018 as a member and subsequently released her solo single album "Olivia Hye" on March 30, 2018.