Gender: Male Appearance: Fairly handsome Personality: Funny, kind, and warm-hearted. A natural comedian. The protagonist of Fool-Making Riddles. He is a genius at coming up with trick questions. While he isn't good at schoolwork, he is a master of riddles. Family: Lee Bong-ja Friends: Jung Mal-geum, Yang Dae-jang, Chorong-i He is the disciple of Master Na Ttok-ttok.

Gender: Female Appearance: Pretty Personality: Kind and warm-hearted Bong-du's older sister and a fellow riddle expert. She dislikes Yang Dae-jang because he makes her feel uncomfortable. Family: Lee Bong-du Friends: Yang Dae-jang, Jung Mal-geum, Chorong-i She is quite skilled at creating trick questions.

Gender: Male Personality: Kind and smart Appearance: Fairly handsome Diligent and top of his class. He is highly intelligent and excels at creating riddles using complex logic and tricks. He is Bong-du's close friend and Jung Il-deung's older brother. Family: Jung Mal-ru, Jung Il-deung Friends: Bong-du, Bong-ja, Yang Dae-jang, Chorong-i

Gender: Male Personality: Warm-hearted Appearance: Fairly handsome He has a crush on Bong-ja and follows her everywhere. He is decent at Fool-Making Riddles. Friends: Bong-du, Bong-ja, Jung Mal-geum He constantly acts cute and shows affection whenever he is in front of Bong-ja.

Gender: Male Personality: Smart, kind, and warm-hearted Appearance: Handsome Highly intelligent and excels at school. He is a master of riddle patterns and logic. He always carries a pencil with him. He is Jung Mal-geum's younger brother. Friends: Bong-du, Bong-ja, Yang Dae-jang Family: Jung Mal-ru, Jung Mal-geum

Gender: Male Personality: Kind and warm-hearted Appearance: Decent-looking The father of Jung Il-deung and Jung Mal-geum. He is very smart and skilled at trick questions. He is close friends with Na Ttok-ttok and always wears black glasses. Friends: Na Ttok-ttok, Bong-du Family: Jung Il-deung, Jung Mal-geum

Gender: Male Personality: Quiet and cold Appearance: Fairly handsome Bong-du's master and the author of the Fool-Making Riddle series, having written 10 volumes. He is a genius at riddles and a close friend of Jung Mal-ru. Friend: Jung Mal-ru Disciple: Lee Bong-du (Master-Disciple relationship)

Gender: Male Personality: Kind and warm-hearted Appearance: Fairly handsome He has a chubby build and always wears glasses. He loves food and will eat anything in sight. He is Bong-du's senior from middle school. He is simple-minded and his anger melts away instantly if given food. He is moderately good at trick questions. Friends: Bong-du, Bong-ja, Yang Dae-jang, Jung Mal-geum