HaSeul (하슬) is a South Korean singer currently under BlockBerryCreative. She is a member of girl group LOONA and the leader of its sub-unit LOONA 1/3. She was introduced as the group's third member in December 2016.
1997-2017: Early life and career beginnings
On December 8, 2016, HaSeul was revealed as the third member of girl group LOONA, and released her pre-debut single on December 15, 2016.
In October 2017, HaSeul, along with fellow LOONA members HeeJin and HyunJin auditioned for survival reality show MIXNINE, but HaSeul was the only one who did not pass the auditions.