Niki Hyun Yang (born in Seoul, South Korea as Hyun Jeong Yang; Hangul: 양현정; RR: Yang Hyeonjeong) is a South Korean animator and voice actress best known for voicing BMO and Lady Rainicorn on Adventure Time. For Disney, she was a writer and storyboard artist on Fish Hooks and Gravity Falls, also voicing Candy Chiu in the latter show.