well Fire Lord Ozai is the ruthless, permanently shadowed FirebendEr ruler of the Fire Nation (currently for six or seven years), brother of General Iroh, son to Fire Lord Azulon and Fire Lady Ilah, and father to Prince Zuko and Princess Azula. He is also the husband of Lady Ursa. The Fire Lord is leading his country in a century-long war against the other three nations of the world, the goal of which is to create a planetwide empire. The war began when Ozai's grandfather Fire Lord Sozin utilized the firebending-enhancing powers of a comet to launch his first strike, the genocide of the Air Nomads. Now, the war is in its final stages. By summer's end, Sozin's comet will return, giving the Fire Nation the power needed to storm the Earth Kingdom capital of Ba Sing Se and realize Ozai's goal of world conquest.In the Book Two episode "Zuko Alone," it is revealed Ozai is second born; Iroh should have been Fire Lord by birthright. In this episode, which is mostly flashbacks, we see him requesting his father, Fire Lord Azulon, change the rules so that Ozai, rather than Iroh, can inherit the throne; Azulon is shown as being furious at this, and says he will not allow it. Azulon also states that Ozai is to be punished for his request but it is unknown what that punishment was. He died soon afterwards, and Ozai took the throne ??? which, at the funeral, is said to have been Azulon's wish. Ozai's cruelty and aggression seems to stem from his own failed relationship with his father. Ozai's visage is only in shadow, and he has not taken an active part in the show aside from giving commands. One thing is clear though, if the war is to end Ozai must be stopped.