E-TION is a vocalist of ONF and a member of the group’s ON Team. His singing contributes a flexible, bright tone to the collective arrangements that distinguish ONF’s electronic pop and theatrical live shows.

His legal name is Lee Chang-yun. He debuted with the group in August 2017 and continued his career following military service. E-TION joined all six members in moving from WM Entertainment to KI Entertainment in March 2026.

Group stages, vocal covers, soundtrack appearances and album tracks are not treated here as a separately issued E-TION solo single or EP; an independently released solo record was not established in the sources reviewed.

E-TION has supported ONF’s vocal harmonies since debut and contributes to the group’s live-stage balance. Group songs and shared performances are not classified as independent solo releases.