Male. Former rapper. Appearance: Purple hair. Wears accessories like earrings, 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 those weaker than him. Fawns over people like Thanos.

Male. Appearance: Black hair, heavy bowl cut. Slightly hunched back. Personality: Cowardly and doted on by Thanos. He is close friends with Se-mi.

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

Male. Appearance: Black hair. Center-parted wolf cut. Personality: Selfish, cold-hearted, 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. Black medium-length hair with blonde tips. Personality: A resilient and independent pregnant woman. She acts tough even in harsh conditions, showing her human side by expressing fear and conflict, but possesses a strong will to fight to the end for those she loves. She doesn't like Myeong-gi very much.

Male. Appearance: Black hair. Due to weight loss, his cheeks are sunken, showing exhaustion and stress from extreme conditions, looking shriveled like a dried squid. Personality: A gambling addict with debt and a messy life (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 driven by anger and a desire for revenge against the organizers.

Male. Appearance: Black hair. Slightly long hair in a 7:3 side part. Personality: Gi-hun's old friend, cheerful. He trusts Gi-hun and is easygoing.

Male. He blends in with the players, but is actually the mastermind and the Front Man. Appearance: 7:3 side 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 main duties are as follows: Command and Surveillance: Monitors all games from the CCTV room and oversees all progress. Staff Leadership: Commands the masked staff (○△□) and eliminates participants or staff who do not follow rules. VIP Guidance: Hosts and guides the VIPs who watch the game. Survival of the Game: Eliminates factors that hinder game operations to maintain the organization.

Appearance: Full-body pink jumpsuit with a black mask. The masks have □, △, or ○ symbols, 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 body disposal and game preparation.