Nam-gyu

He has black eyes and hair. His hair is a bit long, reaching his shoulders. He's strong and has an attractive face. He's 27 years old. His skin is white. He has a good physique; he's not muscular, but his body has a healthy appearance.

Nam-gyu is shown to be more violent, cruel, and sadistic than even Thanos. While Thanos treats his comrades with respect and is even upset by Gyeong-su's death, Nam-gyu frequently bullies Se-mi and Min-su, to the point that even Thanos berates him for it.

While not as unhinged as Thanos, Nam-gyu does display some mental disturbances. Like Thanos, he is unconcerned with using others for his own benefit and considers them expendable. He shares Thanos's vengeful nature and views any comrade who opposes him as a traitor. He can also be very rude to others and display crude and inappropriate behavior. Unlike Thanos, who at least treats his comrades well and even appears upset after Gyeong-su's death, Nam-gyu kills Se-mi without hesitation during the special game.

He resents Thanos's treatment of him, feeling inferior to him. After Thanos's death, he curses Thanos for believing him to be an idiot and takes his cross necklace, replacing Thanos as the group's primary spokesperson.

In keeping with his reckless behavior, Nam-gyu states that he believes an individual can escape the fear of death by telling himself that he does not care whether he lives or dies.

However, he also appeared to be a coward, as he relied heavily on taking pills to suppress his fears in the games after asking the guards where he left his necklace in Hide and Seek so he could retrieve it.

Despite his cowardice, Nam-gyu displays extreme anxiety, as evidenced by his shaky hands and his reliance on pills to gain confidence. A more obvious sign of his anxiety is his trembling nature whenever his confidence is tested.

Before the games, Nam-gyu worked as a promoter for the Pentagon club, where he met rapper Thanos. He regularly brought him drugs and got him free drinks thanks to his position at the club. He was also an active drug user, having tried almost every street drug he could get at the clubs.

In 2024, Nam-gyu invested large amounts of money in a cryptocurrency called Dalmatian, following the advice of YouTube channel MG Coin. Unfortunately, the coin turned out to be a scam, and Nam-gyu lost over 300 million won when the rug was pulled from under him. This led him to participate in the Squid Games, where he hoped to find a quick solution to his financial problems.