While we get to know the backstory of most of the game's contestants, there are a handful we only get to know through their interactions during the games, whose private lives remain relatively mysterious.
Because of this, Ali is unable to provide for his wife and child, demonstrating the way that immigrants in the workforce are often mistreated and exploited by Korean society.
After a nine-year break from television, O returned as Oh Ilnam in Squid Game, a mysterious elderly man with a brain tumor and early signs of dementia.