Jeon Yoo Jin, known professionally as Sat Byeol, is a South Korean singer, dancer, actress, former member of GIRLS ALERT (소녀주의보, also known as GsA) and PIXY (픽시). Originally using the stage name Saetbyeol, she debuted as a member of GsA in May 2017 with the group's first digital single "Dreamgirls". Unfortunately, Roots Entertainment (뿌리엔터테인먼트) faced severe financial distress during the COVID-19 pandemic and decided to terminate the contracts of all the members. The group did not disband but was re-organized as a trio. She was left out of the new lineup and decided to leave the agency. After switching agencies, she re-debuted in February 2021 as PIXY's lead rapper and visual with their first digital single, "With My Wings". In August 2022, ALLART Entertainment (올라트엔터테인먼트) announced that she was leaving the group due to poor physical health and mental stress. Her contract was terminated. She is now focusing on her YouTube channel. (Source: MyDramaList) Watch drama online for free.