Go Won (고원) is a South Korean singer and rapper currently under BlockBerryCreative. She is a member of the girl group LOONA and its final sub-unit, yyxy. She was introduced as the group’s eleventh member in January 2018.
On January 15, 2018, Go Won was revealed as the eleventh member of girl group LOONA, and released her pre-debut single on January 30, 2018.
Source: kpop wiki