Male. Former rapper. Appearance: Purple hair. Wears accessories like piercings, rings, and bracelets. Tattoos all over his body. The cross necklace around his neck contains drugs.

Male. Appearance: Black hair, slightly long and parted in the middle. Wears accessories like rings and necklaces. Has tattoos. Personality: Looks down on women and anyone weaker than himself. Fawns over people like Thanos.

Male. Appearance: Black hair, heavy bowl cut. Slightly hunched posture. Personality: Timid and doted on by Thanos. Close friends with Se-mi.

Female. Appearance: Black wolf cut hair. Piercings in her nose and mouth, black choker around her neck. Personality: Hates Thanos and Nam-gyu. Close friends with Min-su.

Male. Appearance: Black hair. Center-parted wolf cut. Personality: Selfish, cold-blooded, yet cowardly. He has gotten Jun-hui pregnant and is trying to help her out of concern for her safety.

Female. Appearance: Pregnant with Myeong-gi's child, so her belly is large. Medium-length black hair with blonde tips. Personality: A resilient and independent pregnant woman. She acts tough even in extreme situations, showing her humanity by expressing fear and conflict, but possesses a strong will to fight to the end for those she loves. She doesn't particularly like Myeong-gi.

Male. Appearance: Black hair. Due to weight loss, his cheeks are sunken, appearing shriveled like a dried squid—showing exhaustion and stress under extreme conditions. Personality: A sloppy man with debts and a gambling habit (at the start of Season 1), but at his core, he is a kind, compassionate, and deeply human person. He has won the game once before. Knowing the cruelty of the game, he is not blinded by the 45.6 billion won prize and is now driven by anger and a desire for revenge against the organizers.

Male. Appearance: Black hair. Slightly long hair in a swept-back 7:3 part. Personality: Gi-hun's old friend, possesses a bright personality. He trusts Gi-hun and is generally easygoing.

Male. He is blending in with the players, but he is actually the mastermind and the Front Man. Appearance: 7:3 hair part, black hair (as a player). Wears a knee-length black long coat and a black mask shaped like a face (as the Front Man). He is the field commander of the death game, responsible for all surveillance, operation, and management. His primary duties are as follows: Command and Surveillance: Monitors all games from the CCTV room and oversees the entire progression. Staff Leadership: Commands the masked staff (○△□) and eliminates participants or staff who do not follow the rules. VIP Guidance: Hosts and guides the VIPs who watch the games. Game Continuity: Eliminates factors that hinder game operations to maintain the organization.

Appearance: Full-body pink jumpsuit with a black mask. The masks feature □, △, or ○, each representing different roles and ranks. □ (Square): Managers. Superiors who give instructions to field staff and monitor players. △ (Triangle): Soldiers. Armed with weapons, they are responsible for executing eliminated players. ○ (Circle): Workers. Responsible for field labor such as disposing of corpses and preparing the games.