Jeonghan

Yoon Jeonghan, known mononymously as Jeonghan, is a vocalist of SEVENTEEN celebrated for his ethereal visuals and mischievous personality. Born on October 4, 1995, in Seoul, South Korea, he joined Pledis Entertainment relatively late compared to other members, training for approximately one year before SEVENTEEN's debut in May 2015. His striking appearance — particularly his signature long hair in the group's early years — quickly made him one of the most recognizable members.

Jeonghan's vocal color is warm and gentle, often serving as the emotional heart of SEVENTEEN's harmonies in the Vocal Unit. His performances are marked by an easy, natural stage presence that contrasts with the intensity of some of his colleagues. Within the group, he is known for his sharp wit and playful manipulation of younger members, earning the paradoxical nickname "Devil" alongside the earlier "Angel."

Beyond his vocal contributions, Jeonghan has developed a reputation as one of the most entertaining personalities in K-pop variety programming. His ability to maintain a completely straight face during pranks, combined with his quick comedic timing, has generated countless viral moments across SEVENTEEN's reality content. His friendship with S.Coups — the "JeongCheol" duo — is frequently celebrated as one of K-pop's warmest leader-member bonds.

Jeonghan enrolled in public service military duty on September 26, 2024, with an expected discharge date of June 25, 2026. Prior to his enlistment, he participated in SEVENTEEN's 2023-2024 activities including the "Follow" world tour and the "Spill the Feels" comeback, ensuring fans had a full final chapter before his temporary absence.