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were controlled Azula was one of the most skilled Firebenders of her time, recognized as a prodigy by both Ozai and Zuko. The most notable feature of Princess Azula's Firebending was her ability to create her signature blue flames, which were far more intense than the red, orange, and yellow fire typically used by Firebenders. Azula was seen bending ordinary fire during her childhood (and in the opening sequence). Azula also used her flames in ways never before seen, such as for propulsion and creating flaming swords. She often used Firebending with only two fingers, instead of the closed fist or open hand common to other Firebenders. Also remarkable was her ability to produce a greater number of flames than most Firebenders without tiring, as she demonstrated the capacity to sustain successive bouts for extended periods.

She had also demonstrated the ability to condense her flames, allowing them to cut through various objects. When formed into fireballs, the flames caused considerable concussion, capable of firmly pulverizing objects such as stones. Azula was able to generate powerful shields of swirling flames that could withstand the weight of four simultaneous elemental attacks (and a boomerang). She was even able to charge her fire before releasing it, as seen during her fight with Aang. Azula was also able to fight several Kyoshi Warriors, utilizing both firebending and hand-to-hand combat techniques. The outcome of this fight is not shown, but the fact that Azula, Mai, and Ty Lee infiltrated Ba Sing Se posing as Kyoshi Warriors revealed that Azula had won. Azula later indicated that Suki was her favorite prisoner, further revealing that she had won the duel against Suki.

Azula is a teenage girl with black hair, brown eyes (sometimes depicted as yellow), and fair skin. She is short, estimated to be 1.49 or 1.53 meters tall. She is slightly shorter than her brother Zuko but slightly taller than Ty Lee.

Azula wears the Fire Nation military national dress, which consists of a red outfit with puffy sleeves, prominent shoulder pads, and baggy pants. Azula wears a flame-shaped hair clip, and her hair is styled in a bun with a parted fringe that exposes her forehead. She is seen wearing red lipstick in all her current appearances, except when she is in her bedroom. On various occasions, she is seen wearing a black cloak. Her shoes have a stylized sole that allows her to glide with ease.

Azula is demanding, fiercely loyal to the Fire Nation, and determined to achieve her goals without hesitation or complaint. She is unimpressed, and initially, much of her personality and emotions remained a mystery. Azula claims to have been born with the "divine right" to rule, and that this is what made her strong. She showed no mercy to those she deemed traitors or inferiors. Azula is known for her firm leadership methods, coupled with her coldness. From a young age, she was apathetic towards her loved ones, displaying hostility and condescension.