Kang Sae-byeok is a central character in the South Korean series 'Ojing-eo Geim' (Squid Game). She is a North Korean defector who enters the deadly competition to secure a better future for her younger brother and reunite with her family. Known for her resourcefulness, determination, and quiet strength, Sae-byeok is a skilled pickpocket, which aids her in the survival games. Her character embodies the struggles of marginalized individuals in society, highlighting themes of desperation and hope amidst dire circumstances.