He is a professional rapper who joined the 2024 Squid Game to pay off his debts. Thanos is a prominent member of Team O, the leader of Thanos Team, and the archenemy of Lee Myung-gi. Thanos was on the verge of killing himself until he was offered an invitation to the Squid Game by a recruiter. Deciding to make his mother proud, Thanos accepted the invitation to the games. While initially depicted as a petty and vain bully and shown to be genuinely horrified by Mi-na’s death, Thanos reveals himself to be highly psychotic and unpredictable when he’s on drugs, finding entertainment in brutally murdering the other contestants such as during Red Light Green Light. His rage may reach a murderous intensity if someone slights or confronts him, as seen when he attempts to strangle Myung-gi during their brawl in the bathroom.