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

Filmography

• 2025Winter in Sokcho — Bandaged Woman
• Love & Wish — Hong-yeon
• Love in Black Hole — Anna
• 2018Love Again — Hui-hyeon
• 다이아′s 욜로트립
• 2016DIA 1st Concert "First Miracle" — Huihyun

Appearances as themselves (2)

• Produce 101 — Self - Contestant
• Men on a Mission — Self