Azula is a major antagonist in Avatar: The Last Airbender, the Fire Nation princess and younger sister of Zuko. A prodigy in firebending, she is highly intelligent, ruthless, and deeply strategic, often serving as one of the series' most dangerous threats. She relentlessly pursues the Avatar and her own path to power, embodying the Fire Nation's militaristic ambition. Her role is central to the conflict in the later seasons, where she becomes a key force driving tension, betrayal, and escalation.