Satbyul (샛별; formerly known as Saetbyeol) is a South Korean singer and rapper currently a member of the girl group PIXY. She is a former member of GsA. Originally using the stage name Saetbyeol, she debuted as a member of GsA on May 25, 2017 with the group's first digital single "Dreamgirls". In October, she became a contestant on the survival show MIXNINE. She was eliminated in episode 7 after ranking 161st place. On April 23, 2020, it was announced that she had left GsA following the termination of her contract due to the COVID-19 pandemic. On July 3, 2020, she revealed via Instagram that she became a member of PIXY.