Main Characters

• Aang (Zach Tyler Eisen) is the fun-loving, protagonist of the series, who had been frozen in ice with his flying bison, Appa, for many years. He is freed by a young Waterbender named Katara. Who, later becomes his love intrest. He is the current incarnation of the Avatar, the spirit of the planet manifested in human form. Aang is a reluctant hero, trying to return balance to the world.

• Katara (Mae Whitman) is a powerful, 14-year-old Waterbender of the Southern Water Tribe. Katara and her brother, Sokka, discover and free Aang from a block of ice in which he had been for many years. With her brother Sokka, she accompanies Aang on his quest to defeat the Fire Lord, and eventually becomes his Waterbending teacher. Katara is also one of the only Waterbenders that have the ability to Bloodbend which allows her to control any person by bending the water inside the blood, although she is reluctant to use the ability. In the original unaired pilot episode, Katara's name was Kya; this later is stated to be her mother's name.

• Sokka (Jack DeSena) is a 15-year-old warrior of the Southern Water Tribe. With his sister, Katara, he accompanies Aang on his quest to defeat the Fire Lord. The joker of the group, Sokka describes himself as "meat-loving" and "sarcastic". Unlike his companions, Sokka does not have any bending ability, but the series, though it often makes him the victim of comedy at his expense, frequently grants him opportunities to use his ingenuity and weapons, including his trusty boomerang and a sword he forged from a meteorite. From creator Michael Dante DiMartino it was revealed that Sokka too had some waterbending potential, but never realized he had any.

• Toph Bei Fong (Jessie Flower) is a 12-year-old blind, tough Earthbender that appears in the second season of the show. Not long after meeting Aang and his friends, she leaves her wealthy family and comfortable home to join Aang on his quest, with a plan to teach him Earthbending. Though blind, Toph "sees" by feeling the vibrations in the ground through her feet. She is the only Earthbender to learn to bend metal and is considered one of the most powerful Earthbenders.

• Zuko (Dante Basco) is the 16-year-old exiled prince of the Fire Nation and original antagonist of the series. Due to events in Zuko's past, his father, Fire Lord Ozai, deems him a complete failure, and Zuko feels he must capture the Avatar to regain his honor. Over time, Zuko struggles to deal with his anger, self-pity, and familial relationships; meanwhile, he grows sympathetic to the people his nation has terrorized. he takes on the identity of "the blue spirit" at the end of season 1 and the beginning of season two. origionally "the blue spirit" was going to be "the red spirit". In season three, he defects from the Fire Nation, and joins Aang and the team in order to teach Aang Firebending. At the end of the series, he is crowned ruler of the Fire Nation. He was said to be the original love intrest of Katara.

• Azula (Grey DeLisle) is the manipulative 14-year-old (at the beginning of season two) princess of the Fire Nation. She is Zuko's younger sister and one of the major antagonists of the series. Azula is a Firebending prodigy and is one of the few living Firebenders capable of casting lightning. She has no qualms about bullying and threatening her relatives or friends, reserving any familial loyalty for her father.

• Iroh (Mako in season one and two. Greg Baldwin in season three) is a retired Fire Nation general, known as the Dragon of the West, and Prince Zuko's uncle and mentor. Iroh was the original heir to the Fire Nation throne until his brother usurped the throne after Fire Lord Azulon's death. On the surface, Iroh is a cheerful, kind, and optimistically eccentric, tea loving old man, but he still remains a powerful warrior and a devoted surrogate parent to Zuko. Iroh is a Grand Master of the Order of the White Lotus, a secret society of men from all nations and helps retake Ba Sing Se during the series finale. Unlike most Firebenders, Iroh does not use fury as the source of his strength; instead he uses the original Firebending skills learned from the Dragons. It is said from Michael Dante DiMartino that Iroh taught Zuko how to use Azula's ligthing attack, but never used it at full power, alas the episode with Zuko's learning of this attack was un-aired for unknown reasons. The episode was supposedly named, "Book 3, Chapter 17 'Zuko advances'"(since this episode was reflected on only Zuko's training), but for unknown reasons, this episode was replaced by "The Ember Island Players."