Zuko is the Crown Prince of the Fire Nation and a skilled firebender, meaning he has the ability to create and control fire. He is the eldest child of Fire Lord Ozai and Ursa, the older brother of Princess Azula and a nephew/surrogate/adopted son to Iroh. Before the events of the series, Zuko is banished from the Fire Nation by his father and told he must capture the Avatar, a unique spiritually powerful individual who could threaten Ozai's plan for global conquest, in order to restore his honor and right to the throne. Zuko is accompanied and advised in his search by his uncle Iroh. At the beginning of the series, he is the primary antagonist opposing the Avatar. Over time, Zuko loses faith in the Fire Nation's war, feels guilt for his crimes, and begins to sympathize with those the Fire Nation has oppressed. In the later part of the animated series, Zuko joins the Avatar, teaches the Avatar firebending and fights to overthrow his father and restore peace. Zuko also comes to realize that Iroh has been more of a father to him than Ozai and begins to see him as his real father.