Fire Lord Ozai is the tyrannical ruler of the Fire Nation in Avatar: The Last Airbender. He is the main political and military antagonist, driving the Hundred Year War and demanding absolute obedience through fear and power. Ozai is ruthless, ambitious, and obsessed with conquest, including his plan to use Sozin’s Comet to dominate the world. He serves as Aang’s final major enemy and represents the destructive extremes of imperialism, power, and control.