Aang (Zach Tyler Eisen) is the fun-loving, 12-year-old protagonist of the series . He is the current incarnation of the Avatar, the spirit of the planet manifested in human form. As the Avatar, Aang must master all four elements to bring peace to the world and restore the balance between the four Nations.
Katara (Mae Whitman) is 14 years old, and the sole remaining Waterbender of the Southern Water Tribe. Katara, along with her brother, Sokka, discovers Aang at the beginning of the series. She and Sokka accompany him on his quest to defeat the Fire Lord and bring peace to the war-torn nations. Katara is mature, loving, and responsible.
Sokka (Jack DeSena) is a 15-year-old warrior of the Southern Water Tribe who, with his sister Katara, accompanies Aang on his quest to defeat the Fire Lord. Sokka describes himself as "meat-loving" and "sarcastic." Unlike his companions, Sokka cannot bend an element.
Toph Bei Fong (Jessie Flower) is a 12-year-old, blind Earthbender who leaves her wealthy lifestyle and home to join Aang on his quest in order to teach him earthbending. Toph has largely lived alone all her life due to overprotective parents, which makes her somewhat selfish, sarcastic, and, at times, bitter and arrogant.
Zuko (Dante Basco) is the exiled 16-year-old prince of the Fire Nation. Zuko is obsessed with capturing the Avatar in his quest to restore his honor and redeem himself in the eyes of his father, Fire Lord Ozai.
