* Aang: The Avatar, a young boy who can bend all four elements (air, water, earth, and fire).
* Katara: A waterbender from the Southern Water Tribe who becomes Aang's close friend and love interest.
* Sokka: Katara's older brother, a non-bender who fights with a boomerang.
* Toph Beifong: A blind earthbender from a wealthy family who joins Aang's group.
* Zuko: The exiled prince of the Fire Nation who seeks to capture Aang in order to regain his honor.
* Iroh: Zuko's uncle, a wise and powerful firebender who accompanies Zuko on his journey.
* Azula: Zuko's sister, a powerful and ruthless firebender.