An eccentric guy with a grating personality who loves teasing others and has a foul mouth—prone to using vulgar language. He has a rather short temper. He favors flashy outfits and always wears his signature yellow-tinted glasses. He is never short on cash and does everything purely for the fun of it. He has a split tongue and numerous piercings in his ears and on his face—the embodiment of a snake.

He is a large, scarred man with a truly intimidating appearance, yet he possesses the gentlest and most "human" nature of the entire group. Facing financial hardship and the responsibility of supporting his two younger siblings' education, he is willing to do anything for money—such as taking a hit for Wooin simply because he is being paid to act as his bodyguard. Despite his rough exterior, he often performs acts of genuine humanity.

He is a Grim Reaper in every sense of the word. Morose, taciturn, and unapproachable, he acts on impulse; no one can truly understand him. He is prone to rough, aggressive behavior and harbors a deeply defiant, anti-social nature. He is willing to crash right off the track alongside his rival just to achieve his goal, showing no regard for his own safety. Ultimately, he is someone who does everything purely for the thrill of it.

He is a man driven to the brink of madness by his need for money. He is prepared to abandon and trample over everything—even betray others—if it means making a profit. He desperately needs funds to treat his mother, whose battle with cancer is taking a turn for the worse. Having experienced firsthand the terrifying reality of financial destitution, he will stop at nothing for the sake of money. He lacks the reckless abandon of Wooin, yet he no longer possesses the shred of humanity found in Joker.