When the story begins in
Book One, Iroh is accompanying his nephew the banished Prince
Zuko in his quest to capture the Avatar, a superhuman whose task to maintain world order makes him a threat to the Fire Nation's campaign of conquest. Having learnt of the plan of Zhao, a Fire National admiral, to kill the moon spirit to take away the Water Tribes' power of waterbending, disrupting the natural order, Iroh attacks Zhao and is named a traitor. During
Book Two, he and his nephew are now fugitives from the Fire Nation. After being gravely wounded by his niece
Azula and cared for by his nephew, Iroh teaches Zuko a waterbending-inspired technique of redirecting lightning, which can be generated by an advanced form of firebending which Zuko, with his unfocused mind, has been unable to master, but which his sister and competitor to the throne, easily commands, being a firebending prodigy. Iroh eventually takes refuge in Ba Sing Se, where he and Zuko operate a tea-house. Iroh is dismayed when Azula convinces her brother to betray them and is arrested while covering Aang and his friends' escape from the conquered city. In
Book Three, held in a Fire Nation prison, Iroh fakes madness while preparing himself for the
solar eclipse, during which Firebending does not work. Once the eclipse begins, Iroh escapes his cell, being a formidable opponent even without the use of firebending. In
the series finale, Iroh has called the White Lotus to free Ba Sing Se from the Fire Nation—fulfilling his childhood vision, but as a liberator, not a conqueror. After the war ends, Iroh is offered the Fire Lord's throne, but he asks Zuko to be crowned instead. Soon after Zuko's coronation as Fire Lord, Iroh returns to Ba Sing Se to operate his tea shop; the final scenes of the series take place in that shop. In the comic book sequel
The Promise, Iroh offers Aang and Zuko advice on dealing with the Harmony Restoration Movement, a movement that aims to expel members of the Fire Nation ethnic group from Earth Kingdom territory; he also invents
bubble tea. In the comic book
The Search, Iroh becomes acting Firelord while Zuko travels to locate his mother Ursa. Bored with his new title, he uses his authority to declare a National Tea Appreciation Day. In the sequel series
The Legend of Korra, Iroh is revealed to have used a form of
astral projection to become a resident of the Spirit World. In the episode "A New Spiritual Age", Iroh comes to the aid of Aang's successor as Avatar,
Korra, who is trapped unprepared deep in the Spirit World. In the episode "Darkness Falls", having known them in life, Iroh encounters Aang's children
Tenzin, Kya, and Bumi when they enter the Spirit World and provides them with hints as to the location of the spirit of Tenzin's daughter Jinora. Korra again encounters Iroh in "The Ultimatum", when she enters the Spirit World in search of the anarchist terrorist Zaheer. Korra explains to Iroh that she is confused and doesn't know how to deal with the threat Zaheer poses to both the newly reformed Air Nation and the world. Iroh suggests that Korra seek Zuko's counsel, as Aang once did. Zuko's grandson is named Iroh in honor of his great-granduncle, and is a general of the United Forces, the armed services of the United Republic of Nations, a multi-ethnic nation founded by Aang and Zuko out of territories that were disputed between the Fire Nation and Earth Kingdom after the end of the Hundred Years' War. ==Personality==