Choa is the main vocalist of Crayon Pop and likes to be called princess. She is also the older twin sister of Way. Despite being a high school dropout, she is currently an acting major at Seoul Institute of the Arts and had a minor role in a KBS Korean drama 'High School - Love On'. She was also featured on label-mate's Zan Zan's debut single MV and contributed her vocals to one of their tracks. Together with Way, they had formed Crayon Pop's first subunit, Strawberry Milk.