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A mysterious and ruthless leader of a shadowy organization seeking to harness ancient fire magic. They see Leo's power as the key to their apocalyptic goals.

A seemingly ordinary father who has spent years hiding his true identity as a legendary pyromancer to protect his family. He must now confront his past to save his son.

Elias's young son who unexpectedly manifests an ancient, uncontrollable fire magic. He is confused and terrified by his new abilities.

Banished Prince of the Fire Nation, obsessed with capturing the Avatar to restore his honor.

Zuko's wise and tea-loving uncle, who secretly hopes his nephew will find a peaceful path.

A powerful, ancient spirit seeking a mortal vessel to bring true balance to the spirit and physical worlds.