The structured facts provided describe Ida (Koh Chaeyoung), a former leader and sub-vocalist of the group MAJORS. The narrative material supplied, however, pertains to Oh Hayoung of Apink and contains no information about Ida. Without sourced narrative content specific to Ida — no debut details, discography, chart history, or career milestones — a factually grounded profile cannot be constructed beyond the bare biographical data points.
What can be stated: Ida, born May 19, 2000, is a South Korean artist who performed as leader and sub-vocalist of MAJORS. Her group membership is listed as concluded.
No further detail is available in the provided material.
