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Ki Hui-hyeon, better known by the mononym Huihyun and former stage name Cathy, is a South Korean singer and rapper. She is best known as a member of the South Korean girl group DIA.
Ki Hui-hyeon, better known by the mononym Huihyun and former stage name Cathy, is a South Korean singer and rapper. She is best known as a member of the South Korean girl group DIA.