Lu Ten (Earth-2213)

"Happy birthday, my son. If only I could have helped you."

- Iroh

Prince Lu Ten was the son of Sannin General Iroh, the nephew of Ozai and Ursa, the cousin of Zuko and Azula, the grandson of Azulon, and the great-grandson of Sozin. While serving during the Second Hundred Year War, he was killed during the six-hundred-day Siege of Ba Sing Se. His death led Iroh to a deep depression and the abandonment of the siege, leading Ozai to usurp the throne of the Land of Fire.

Biography
Lu Ten was killed in action against shinobi of Iwagakure in the last year of the Second Hundred Year War, during the six-hundred-day Siege of Ba Sing Se. After Iroh learned of Lu Ten's death, he became so heartbroken that he gave up and abandoned the siege, claiming that he and his subordinates were exhausted from the violence. Once Iroh's brother Ozai learned of his nephew's death and Iroh's reaction, he attempted to convince his father, Fire Lord Azulon, to appoint him as heir to the throne, claiming that, with Lu Ten's death, the bloodline would end with Iroh as he had no other children. Azulon was enraged at the request, but with his mysterious death days later, Ozai usurped the throne. Iroh did not challenge his brother, and did not attempt to secure the throne.

Lu Ten and Iroh had a strong bond, from Lu Ten's childhood to adulthood. His death led Iroh to stay behind a devastated Amegakure in the months that followed the end of the war to take care of Nagato and Konan, two children from the Land of Storms who were left orphaned because of the war. While looking up for the orphans for one month, his personality shifted towards a calm acceptance of life and complete disgust of war.