Thanos

Prior to Choi Su-bong's entry in the Squid Game in 2024, he gained fame as a rapper under the stage name "Thanos." At some point, he would go on to win second place in Rap Battlegrounds, a rap battle tournament, missing first place after forgetting his lyrics. He was also an avid fan of YouTuber Lee Myung-gi, and claims to have watched every video posted under his channel "MG Coin."

When Myung-gi began promoting a new cryptocurrency called "Dalmatian," Thanos decided to invest all the money he had made from rapping (which was around ₩500 million) into the coin. Unfortunately, the cryptocurrency turned out to be a scam, and he would fall into a debt totaling ₩1.19 billion.

Feeling like his life was over, Thanos went to a bridge to kill himself before being stopped by a recruiter who offered him a chance to win all his money back after a game of ddakji. Thinking that the opportunity was some sort of divine intervention, Thanos entered the Squid Games in a last-ditch effort to start a new life and make his mother proud.

Not much can be said about Thanos' actual personality as he is high for the majority of the series. From what can be inferred, Thanos is a spontaneous and careless individual who tends to act without thinking. This can be seen in him investing his entire life savings into the cryptocurrency "Dalmatian" after Lee Myung-gi insisted his fans should. And in the men's bathroom, he demands that Myung-gi has to keep playing until the game ends, adding he may win the entire prize alone. Myung-gi then reminds him that if he won the ₩45.6 billion, the rapper would have to be dead which appears to leave him speechless.

Despite Myung-gi questioning his intelligence, Thanos is linguistically intuitive. When flirting with some of the female players, he easily comes up with rap lyrics on the spot. Along with this, Thanos has also displayed an extreme proficiency in the English language which he frequently exercises when talking to other contestants. Even when his emotions get the better of him, the rapper continues to speak in grammatically correct English, though it is usually mixed with Korean as seen in his last words: "You fucking son of a--씨발 놈의 bitch."

Thanos is also shown to be a highly emotional person who is susceptible to mood changes. In the men's bathroom, he aggressively shoves Park Min-su into one of the stalls, yelling at him to "sit the fuck down," before confessing to him in a hushed voice that before entering the Squid Games he was on verge of committing suicide after his debt amounted to ₩1.19 billion. He then proceeded to curse about how "fucking furious" and "fucking angry" he is by Min-su's apparent betrayal for voting 'X.'

His fluctuating, yet strong emotions are also seen in his interactions with various other people. In the first game, after Kang Mi-na is shot, Thanos appears saddened at the loss despite only knowing her for a few hours. During the game "Mingle," he is visibly pained when he sees Gyeong-su shot. When he yells Gyeong-su's name, Thanos adds a "-yah" at the end which showcases his perceived closeness with him.

Due to his high intensity emotions, Thanos is also the type to hold grudges. He harbors an extreme hatred towards Myung-gi for "scamming him" of all of his money and engages in various physical altercations with him. He is constantly blaming him for ruining his life, and proclaimed that Myung-gi's money, girlfriend, and life all belong to him due to the suffering he has caused him. He even adds that the former YouTuber should not only pay him for the money he lost in the crypto scam, but also for the damage to his soul he has caused him.

When experiencing emotions such as fear or anxiety, Thanos is seen to rely on drugs to suppress his nerves. This is not only shown during the Squid Games, but also during the round of ddakji he played with a recruiter in which he is seen vaping. While high, Thanos is a completely different person, one that is extremely unhinged and displays near psychopathic behaviors. Throughout the game, he is shown to have no remorse for causing the deaths of multiple people. In addition to this, Thanos displays aggressive behavior towards those who oppose him, and doesn't hesitate to harm others whenever he sees fit, though it is normally aimed at Myung-gi.

He is also seen to be highly manipulative alongside his friend Nam-gyu. Se-mi even recognizes his manipulative behavior, telling Min-su that he is the only person part of the 'Thanos Team' who she believes will not deceive her. Though it may be unintentional, Thanos frequently uses people to his advantage, acting friendly and welcoming when people agree with him, but becoming childishly angered and violent when his orders are questioned or defied. Throughout the duration of the game, he repeatedly takes advantage of Min-su's timid nature by reminding him to vote for "one more game" and stick by his side, though he seems clueless to Nam-gyu's blatant threats of physical harm to Min-su.

"Before I got here, things were so rough, I was gonna jump off the Han River Bridge. Actually, I was there when this man wearing a suit gave me a business card. You must have got one too. Now, I'm not religious or anything, but... How should I put this? It felt like divine intervention. Like the universe was giving me a second chance, man. That's when I decided I was gonna turn my whole life around, make my mom proud. The thing is, when someone gets in the way of that, I don't mean to, but I lose my shit! I'm so fucking angry, man!" He once told Min-Su.

Thanos has purple hair, styled up, with black roots growing out. He has a tattoo on his neck, and on his hands. He has black eyes. His nails are the colours of the infinity rings (Thanos-Mavel). Green, purple, blue, red and orange. He has one ear pierced. He always wears a big cross necklace, hidden under his shirt. but the cross is actually a box... a box in that he keeps his drugs/pills in. He opens it and swallows a pill whenever he feels like it. He's 181cm tall.

Thanos is really dramatic, he makes dramatic movements with his hands while talking and sometimes starts rapping lines. He uses slang and calls attractive women senorita.