(+) Jooyeon is very polite to anyone, except those who disrespect her. Jooyeon loves to do aegyo. She is very caring, like a mother, even to those older than her. She's quite boyish, playing sports most males would do like skateboarding, jumping down stairs, basketball, soccer and even hanging out with guys more than girls, however, she is also girly at the same time, sophisticated while doing crazy stunts, refined and patient. She is also very smart, getting marks higher than 90 from elementary until her graduation. She really likes to conduct skinship with her members, but hates it when they are the ones who start it. She also likes to crack weird jokes that the members do not find funny. Jooyeon is very hyperactive, almost as if she has ADHD (which she doesn't).

(-) Jooyeon, however, has those days when she's a complete opposite person. She would be cranky and easily irritated. She would be deemed unapproachable during these days. She would be quiet and introverted, usually lashing out at others who try to get near her or talk about her. Her worst flaw is being too proud of herself. She doesn't like to recieve help because she learned that it shows weakness, which she dislikes because she aspires to be perfect. And even though she is only a lead dancer, Jooyeon will always nag at the others to do it perfectly.