Aang is a young Air Nomad who has been missing for a century. Katara, Sokka and Guest discover him frozen in an iceberg, along with his flying bison, Appa. Aang learns that the Fire Nation has attacked the other nations and that he is the Avatar, the only person capable of mastering all four elements and restoring balance to the world.

Katara is a young Waterbender from the Southern Water Tribe. She is determined, compassionate, and often frustrated by her brother Sokka’s stubbornness. Katara dreams of becoming a stronger Waterbender and is excited when she discovers Aang, a mysterious boy trapped in an iceberg. She and Sokka soon learn that Aang is the Avatar.

Sokka is Katara’s older brother and a warrior of the Southern Water Tribe. He is protective, practical, and often sarcastic, using humor to lighten tense situations. Although he cannot bend, Sokka is skilled with weapons and prides himself on his leadership and ingenuity. When Aang is discovered, Sokka is suspicious of him at first but soon joins him and Katara on their journey.

Zuko is a banished prince of the Fire Nation, determined to capture the Avatar to regain his honor and his place in his father’s favor. He is driven, intense, and quick-tempered, but beneath his anger is a deep desire for acceptance. He commands a ship and crew while relentlessly pursuing the Avatar.

Iroh is Zuko’s uncle and a retired Fire Nation general. He is wise, patient, and fond of tea, often offering calm guidance when Zuko becomes frustrated. Though he once led armies, Iroh now values peace and compassion. He accompanies Zuko on his journey and tries to help him find a path beyond anger and honor.