Squid Game season 1 Seong Gi-hun first appeared in the
first season as the protagonist, introduced stealing money from his mother to gamble on horses with
Park Jung-bae for a gift for his daughter's birthday. He ends up losing the winnings however after being pickpocketed by
a woman while fleeing loan sharks, led by
Kim Jeong-rae. Later, at a train station, he was approached by
a man in a suit, who offered Gi-hun 100,000 won if he could beat him in a game of
ddakji. He eventually wins, getting the won and an invitation to participate in Squid Game. He joined as player 456 of 456, meeting various people, including
an old man, the pickpocket, and his childhood friend,
Cho Sang-woo. The players participate in a game of
Red Light, Green Light, learning that losing results in death. He nearly falls, only to be caught by
Ali Abdul, who crosses the finish line with Gi-hun. It is then revealed that the winner of all six games will receive a cash prize of up to 45.6 billion won, but a slim majority of players vote to leave the game, Gi-hun included. Back home, he returns with
Il-nam in a convenience store and later
Jung-bae for money. He then reports the game to the police, but they are not convinced; police detective
Hwang Jun-ho asks him about the games as his brother had a card similar to the one given to Gi-hun when he was told about the games and has disappeared. Gi-hun declines to help Jun-ho with the matter. He discovers his mother in the hospital, unable to get treatment; he attempts to get a loan from his ex-wife, learning she and their daughter are moving to the United States. Desperate for money, with no other options, he rejoins the Squid Game. The second game prompts players to choose a shape; Gi-hun chose umbrella, only learning afterward they had to remove the shape from a flat snack, Gi-hun having picked the hardest one. He eventually wins by licking it out. During the interim, it is discovered that killing during breaks is permissible, prompting a gangster named
Jang Deok-su to go on a massacre with his allies on other players. He rescues the pickpocket, and learns her name to be Kang Sae-byeok. The lights turn back on, and the killing is made to stop. They then participate in a game of tug-of-war, Gi-hun allying with Sae-byeok, the old man, Ali, Sang-woo, and five others. After winning thanks to the old man's advice, they barricade themselves for the night, taking shifts keeping watch and dissuading Deok-su from attacking by making him feel paranoid. During the night, he experiences PTSD and remembers his co-worker being killed by police during a strike. In the fourth game, they are told to pair up with another player to play with, Gi-hun choosing to partner with the old man. They then learn that the objective is to win your opponent's marbles. Gi-hun struggles with bad luck, but starts to lie during the game in order to win. He learns that the old man knew he was lying, but let him win anyway, giving his name as Oh Il-nam and thanking him for helping him have fun before his apparent execution. During the next game, which is glass stepping stones, Gi-hun is shocked to see Sang-woo kill a man to ensure that he survives, and learns that Sae-byeok was injured during this game. The three are the only remaining survivors, with Gi-hun stopped from killing Sang-woo by Sae-byeok, each of them promising to take care of the other's family if the other dies. She is ultimately killed by Sang-woo to keep her and Gi-hun from voting to leave the game, and the two are sent to fight to the death in the final game. Sang-woo is defeated, but Gi-hun asks to vote to leave, not wanting to kill him, prompting Sang-woo to take his own life so Gi-hun would
win the money by default. Gi-hun is sent back by the
Front Man and returns home then discovering his mother has died, and is unable to spend the money
due to guilt. He later receives an invitation card from
Il-nam, who reveals that he is the mastermind of Squid Game, wanting to relieve his boredom from being so rich. Il-nam challenges Gi-hun to a wager over whether a drunk in the snow would be rescued, only for Gi-hun to win as Il-nam passes away. Some time later, Gi-hun changes his appearance by having red hair. He then takes Sae-byeok's brother out of an orphanage and brings him to Sang-woo's mother, along with a portion of the prize money. On his way to his flight to see his daughter, he sees the same
man in a suit from the train station with another man and gives chase. The man in the suit is gone, but he takes the card from the person who received it and calls the number. He states his intent to rejoin the games and end them once and for all and finding the
Front Man, opting to not board the plane.
Squid Game season 2 In the
second season, set three years later, Gi-hun was paying his former loan sharks, with
Choi Woo-seok and
Kim Jeong-rae to hunt down
the recruiter of the games, eventually tracking him down to a run-down hotel room. The recruiter challenges Gi-hun to a game of
Russian roulette, both casting aspersions at the other. The recruiter challenges him to pull the trigger twice on him, saying that he would prove to be "trash"; Gi-hun pulls the trigger on himself, making the same challenge to the recruiter, who ultimately shoots himself. Gi-hun then joins forces with
Hwang Jun-ho and the mercenaries. He plans with others to track down the
Front Man, having a false tooth with a tracker in it. He was invited into a limo, where he asks to be put into the game so he could take it down, with the Front Man accepting this, becoming Player 456 again. As he wakes up along with other players, a shaman named
Seon-nyeo approaches him and scolds him with the fate of the previous players. He learns of a new rule that players vote to stay or leave after every game now and that his friend,
Park Jung-bae, had joined the game, telling him to stick close to him. During Red Light, Green Light, he discovers that the tracker was removed, preventing his allies from locating him. He explains the consequences of losing to the other players, taking care to instruct them when to freeze. The other players only realize the consequences once the first player dies. Gi-hun then instructs the players to form a line with the taller players in front.
Thanos pushes players off and Gi-hun and the players are forced to run instead towards the finish line as the time almost runs out. He crosses the finish line, but notices a player who had been shot asking for help. He, alongside
Cho Hyun-ju, help him cross, though he is killed anyway by
Kang No-eul, a North Korean defector and Squid Game guard. This time around, everyone participates in a vote to stay or leave after every game, receiving an X for those leaving and an O for those staying. During the vote, Gi-hun loudly declares that he has participated in the games before, inviting skepticism. Gi-hun is then approached by
Im Jeong-dae and
Thanos about him being in the games and wanting advice to win. By a slim majority, the players are made to remain, after Player 001 –
Hwang In-ho, the true identity of the Front Man infiltrating the games as a
mole to sabotage Gi-hun's plans – votes to stay. Numerous players seek out his input for the next game, though Gi-hun is unsure about whether it will be the same game, Dalgona. When the O team, Im Jeong-dae and In-ho confronts Gi-hun, he earns In-ho's trust after fighting
Thanos and
Nam-gyu, saving
Lee Myung-gi's life. In the next game, Jeong-dae and the O Team find out it's a different game, not Dalgona. From there, Gi-hun is insulted by everyone who opposes him. The players are told to form a group of five, with Gi-hun's group consisting of himself, Jung-bae, a former
Marine named
Kang Dae-ho, a pregnant woman named
Kim Jun-hee, and In-ho (calling himself "Oh Young-il"). They are made to have their legs tied side-by-side, each tasked with playing one of five games, each completing their game and crossing the finish line. Another vote is held, with a noticeable majority of players voting to remain, including Jung-bae, who previously voted to leave. They participate in the third game, Mingle, with Gi-hun and his friends allying with
Hyun-ju,
Jang Geum-ja,
Park Yong-sik,
Kim Young-mi and
Park Gyeong-seok. The first round,
Seon-nyeo reminds him about the previous games and him being the lone survivor. The following of Young-mi's death and the aftermath of Mingle, players proceeded to hold another vote. The vote ends up a tie due to players switching sides especially
Park Min-su, forcing them to hold a vote the next day. After the bathroom fight with the X Team and O Team, resulting
Thanos's death, Gi-hun realizes that the game intends for the players to kill each other, warning his group to hide during this until the soldiers enter so they can steal their guns and take over the facility. The O team, led by
Nam-gyu for the riot, to avenge Thanos, starts the riot and Gi-hun and the others hid as the O and X Team massacres each other. After the riot is ended, the guards, sent by the Masked Officer to conclude the killing and the group members pretend to be dead, allowing them to take the guards off guard and steal their weapons, killing them. Gi-hun with Jung-bae, Dae-ho, Hyun-ju and Gyeong-seok along with others joining the rebellion, collects the guns and ammo, leaving the dorm room with a hostage to tell them where to go. He and
Jung-bae go to the command room and the Masked Officer while the others deal with the soldiers, fighting soldiers of their own along the way.
In-ho eventually takes two people with him to help ambush the soldiers from behind and assist Gi-hun and Jung-bae, only to kill the two he brought and fake "Young-il"'s death while radioing Gi-hun. Gi-hun and Jung-bae surrender, and In-ho, now dressed as the Front Man, comes with several other guards and the Masked Officer, executes Jung-bae. The soldiers hold down a horrified Gi-hun and the fight is over.
Squid Game season 3 In the
third season, Gi-hun is returned to the dormitory in a coffin where he wakes up to see players looking at him. He is comforted by his friends and
Cho Hyun-ju asks him where
Jung-bae is. Gi-hun grapples with the trauma of his failed rebellion, tries to get the soldiers to shoot him but is pinned down and ends up not being allowed to vote while being chained to a bunk. He was then bullied and framed by
Im Jeong-dae and others about the rebellion. As
Seon-nyeo mocks him, Gi-hun attempts to kill her, only to be stop by her followers due to being handcuffed. During the fourth game, "
Hide and Seek", still in a state of shock, he is made a seeker and kills
Dae-ho for causing the rebellion to fail, only to later realize that his failure also led to the rebellion's failure. He nearly committed suicide, but was stopped by the guards. During his lowest point,
Geum-ja requested Gi-hun to protect
Jun-hee and her
newborn baby, who gave birth during the fourth game. Though he initially refuses, he regains his resolve and begins to do so after witnessing Geum-ja's suicide following her guilt and shame of killing
her son. He still wasn't allowed to vote, so the next game proceeded. In the fifth game, Gi-hun and several others witnessed
Nam-gyu's death, forcing himself to go next with the baby. He effortlessly passes the
jump rope bridge with the child and encouraged others to go in and pass through. While he was helping others, another player attempted to kill others by pushing them off at the end so that he and Gi-hun can win the money but Gi-hun prevented him from doing so and they fight. Gi-hun gouges his eye and throws him off. As other players passed, time was running out and tried to get Jun-hee but failed to save
Jun-hee, who sacrificed herself due to her injuries and time limit. After the child inherited Jun-hee's number as a player by the VIPs, most of the remaining players began scheming to eliminate the newborn to increase the prize pool. The last game was voted to continue and only Gi-hun and
Park Min-su voted to terminate whilst the other continued.
Hwang In-ho, who reveals himself as The Front Man to Gi-hun, makes a proposition to kill the remaining players in their sleep to ensure his and the child's safety, using the knife where he was given the same proposition by
Oh Il-nam. Although Gi-hun was tempted, he was stopped by a vision of
Kang Sae-byeok, who reminded him that it isn't the person he wanted to be, and rejects the proposition, surprising In-ho. In the final game of
squid, near its climax, Min-su dies for the first round , in the second round Gi-hun gets to know that
Lee Myung-gi player 333 is the babys father and together with him fights with
Im Jeong-dae and the other finalists with the knife In-ho gave him to protect the baby, he then engages in a fierce battle with
Myung-gi in the third an final round and emerges victorious, with the two falling from the platform, Gi-hun managing to hold on to the edge whilst Myung-gi falls to his death. However, after recovering himself, Gi-hun realizes that the two of them neglected to press the button which would initiate the game, meaning Myung-gi's death has been in vain. The VIPs mistakenly believe he has won, as the last competitor was
Jun-hee's baby daughter. However, he chooses to jump off the platform to fulfill a promise he made to
Jun-hee. He declares in his final words that the players were humans, not horses, and jumps off the platform, saving the baby and disproving In-ho's cynical philosophy. His sacrifice stuns the VIPs, and inspires
No-eul, who was close to committing suicide, to continue living. In-ho rescues the baby and leaves as the island's bombs detonate, fulfilling Gi-hun's wish to destroy the Squid Game and saving the baby and indirectly
Gyeong-seok, who had survived by No-eul from the Masked Officer after the revolt. Six months after his death, in May 2025, In-ho meets Gi-hun's daughter, Seong Ga-yeong in
Los Angeles, where he gives her a black box with the games logo containing Gi-hun's blood stained Player 456 uniform and a debit card containing Gi-hun's remaining winnings in the first game. ==Concept and creation==