Jooyeon's classmates describe him as a tsundere, someone who looks cold but is very warm and friendly once you get to know him.
Jooyeon is a very optimistic person.
According to Jooyeon, he eats a lot but doesn't gain weight.
Jooyeon used to dream of becoming a physical education teacher because he is interested in sports and is quite athletic.
Jooyeon likes reading comic books and watching anime.
When he was in high school, Jooyeon sang on the youtube channel called 'Song-Gaetting". His video became a hit and he started recieving offers from different agencies, including JYP Entertainment who was in the process of forming a band. Jooyeon chose JYP Entertainment right away.
Jooyeon used to wear glasses in high school.
During an interview, Jooyeon said that he tries to live by the motto "Let's live as it flows."
Jooyeon went to an all boys school where he used to be in a band.
Jooyeon loves meat and doesn't like eating vegetables.