Korean pop singer who joined the 13-member K-pop girl group Cosmic Girls (aka WJSN), which was formed by Starship Entertainment. They became known for their debut mini album Would You Like?
She became a part of the Cosmic Girls second subgroup called the Joy Unit in 2015.
She and the Cosmic Girls won Rookie of the Year for the 2016 M! Countdown in China.
She was born Son Juyeon but is known under the stage name Eunseo.
She and Lee Luda were both South Korean singers who joined the Cosmic Girls.