During , 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.