Yoon Seo-Yeon
AKA: 윤서연Birthday: 2003-08-06
Birthplace: Daejeon, South Korea
Home Page: https://www.triplescosmos.com/member/s1-seoyeon
Yoon Seo-Yeon is a South Korean idol under MODHAUS and the first revealed member of tripleS. She was revealed as S1 on May 1, 2022.