Eunseo 은서 is the lead vocal of Cosmic Girls.
Eunseo was born Son Juyeon 손주연 on Wednesday, May 27, 1998, in Gwangyeoksi, Incheon.
Like fellow members Cheng Xiao and Mei Qi, she was born in the Chinese Year of the Tiger. Her zodiac star sign is Gemini. Eunseo, Cheng Xiao, and Mei Qi’s blood type is B. At a height of 168 cm or 5'6", she’s the tallest member of Cosmic Girls. She’s taller than the shortest member, Luda, by 11 cm.
Eunseo, Cheng Xiao, Yeoreum, and Dayoung attended Seoul School of Performing Arts.
She has two older sisters.
She’s a member of the sub-unit Joy.