Seo Soojin (서수진; born March 9th, 1998), known mononymously as SOOJIN, is a South Korean singer under BRD Entertainment, previously under CUBE Entertainment. She debuted as a sub rapper, sub-vocalist and the main dancer of (G)I-DLE on May 2nd 2018. On the 14th of August 2021 she was removed from the group following an alleged bullying controversy. Two years later, she made her debut as soloist with the EP AGASSY on November 8th 2023.