Player 306 was in heavy debt and chose to enter the Squid Game to win money. After waking up in a large room with 455 other people, she signed a contract and took her photo.
Later, everyone was taken to the first game: Red Light, Green Light. When the doll turned around, everyone ran forward, with Player 250 and Player 324 ahead of everyone. Player 324 was unable to stop in time when the doll turned back around, causing him to be eliminated. Player 324 then gets shot.
When the doll turned around and called out "green light", Players 324 and 250 ran forward. When the doll called "red light", Player 324 was unable to stop in time and lost his balance, resulting in him being eliminated and shot dead. Upon realizing what had just happened, Player 250 attempted to flee before being shot himself, his blood splattering across Player 306's face. The horror of this caused Player 306 to shriek in panic, resulting in her too being shot dead. This also caused many other players to attempt to escape the game arena, however all who did so were immediately shot dead like Player 306.
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- Player 306 is the first female character to die in Squid Game.
- Player 306 is in one of the series's most iconic scenes, and was used in many trailers for the series.
- Actress Yang Mi-seon did not know that her character would be featured so often, as the script only intructed her to scream, and was surprised to find out that her scene became iconic.