Kim Yoo Yeon is a South Korean singer, dancer and member of tripleS (트리플에스). She graduated from Sehwa Girls' High School and is enrolled in the Science Education program at Ewha Womans University but is currently on a leave of absence.

She made her official debut in October 2022 as part of the sub-unit's Acid Angel from Asia first EP, "Access". Later, in February 2023, she debuted as the full group's leader and visual with their first EP, "Assemble".

They are managed by ModHaus (모드하우스), who crafted tripleS to be a decentralized idol group where the members will rotate between the full group, sub-units, and solo activities, as chosen by fans. As such, she is part of 5 different sub-units: Acid Angel from Asia, Acid Eyes, EVOLution, Visionary Vision and ∞! The agency has also assigned each member a number, and hers is S5.

(Source: MyDramaList) Edit Biography