Seong Gi-hun

Seong Gi-hun, also known as Player 456, is a divorced, debt-ridden father who enters the deadly Squid Game out of sheer financial desperation. Once a charismatic autoworker involved in a brutal labor strike, Gi-hun has since fallen into a life of gambling addiction and petty borrowing, unable to provide for his daughter or aging mother. His decision to join the game is less about greed and more about the suffocating hopelessness of poverty.

Inside the games, Gi-hun's greatest weapon is not physical strength or strategic brilliance but his fundamental humanity. He forms genuine bonds with fellow players — the elderly Oh Il-nam, the calculating Cho Sang-woo, and the fierce Kang Sae-byeok — and repeatedly risks his own survival to help others. His emotional intelligence and refusal to abandon allies distinguish him from competitors who treat the games as purely transactional.

The revelation that his kindly companion Il-nam is actually the game's architect devastates Gi-hun and crystallizes his understanding of how the wealthy exploit the desperate. His final confrontation with Il-nam on the old man's deathbed becomes a philosophical debate about human nature — whether people will help a stranger in need or look away.

After winning the prize money, Gi-hun spirals into a year of depression and survivor's guilt, unable to spend the blood-soaked fortune. His transformation from passive victim to determined avenger drives Season 2, as he re-enters the game not to win money but to destroy the system from within, dyeing his hair red as a symbol of his new resolve.