• Birth date Mar. 24, 1998
• Height/Weight 187cm/68kg
• Blood type O
• MBTI ISTJ
• Nickname Black cat, robot
• Hobbies Reading, listening to music
• Special skills Studying and meditating
• Favorite things Caffeine, flowers
• Dislikes Animals, festivals

Hajun was an ordinary member of K-WONDERLAND. He recently became famous after being filmed in one of Jia’s vlogs by accident. He doesn't like noisy and chaotic places, preferring calm instead.

He is a blunt person, and a man of few words.
He doesn’t like showing his emotions, carrying on with his work silently.
People around him find his personality frustrating, but he couldn't care less.
Although he looks cold, when a player asks for help, he spins around so that the player can find the answer.