The material provided does not contain sufficient verified information about Yu1l (유일) — born Kim Hyun-sook, a former member of D-art and ONEST — to support a substantive profile. The structured facts establish her name, birth date, nationality, and group affiliations, but no details are available regarding her discography, debut circumstances, chart performance, awards, or broader career narrative. The editorial bio and recent coverage supplied belong to a different artist entirely and cannot be applied here.
A profile built on this material alone would require invention to reach any meaningful length, which falls outside sourcing standards. As the material stands, the accurate account is this:
Yu1l (유일), born Kim Hyun-sook on May 4, 1999, is a South Korean vocalist who has been a member of two groups: D-art (다트) and ONEST, in which she served as a vocalist. Further details of her career are not available in the current record.
