Kim Da Yun, also known mononymously as Dayun, is a South Korean singer, dancer, actress and former member of BONUSBaby (보너스베이비). She is enrolled in the Broadcasting Entertainment program at Induk University, and before debuting, she spent 6 months as a trainee.

She made her debut in January 2017 as BONUSBaby's main vocalist with their first digital single, "Between Us". However, in September 2018, Maroo Entertainment Corp. (마루기획) announced the group will go into an indefinite hiatus. Later, the company rebranded and began producing male idol group, GHOST9, so BONUSBaby officially disbanded in July 2020.

She appears to be out of the entertainment industry.

(Source: kisskh) Edit Biography