Azula and Zuko are both the children of Fire Lord Ozai. Since the war ended, Zuko is the new fire lord... but they were both in line for the thrown before that. ...they were both always trained to fight for the Fire Nation.
[A pause, and Katara glances down into her cup, trying to gather her thoughts. There's a lot there that isn't her story to tell, but it's hard to give the full story without... crossing some boundaries. And there's so much that she needs to figure out how to tell Roku, that having Ginko as a sounding board would be... really good.] We learned a lot more about the beginning of the war because we were traveling with Aang. One hundred years ago when Roku was the Avatar, he and Fire Lord Sozin were best friends. They even shared a birthday. When Roku was sixteen, it was revealed that he was the next Avatar, and Roku left to start his training... and Sozin stayed in the Fire Nation to become the Fire Lord.
[It's... so hard to imagine these figures of legend and hatred as... people. But the fact that Roku is here now is proof enough of that.] Years later, when Roku returned to the Fire Nation, he and Sozin reunited. And Sozin confided in his best friend his ambition.
[She takes a sip of her tea. She's not quite looking at Ginko, but neither is she looking down anymore.] All of the nations were living in peace, but the Fire Nation had been enjoying an 'unprecedented amount of prosperity.' And with the Avatar at his side, Sozin wanted to... share that. At least, that's what he said. Roku put him off, telling him to get the thought out of his head. But Sozin never did.
[Action]
[A pause, and Katara glances down into her cup, trying to gather her thoughts. There's a lot there that isn't her story to tell, but it's hard to give the full story without... crossing some boundaries. And there's so much that she needs to figure out how to tell Roku, that having Ginko as a sounding board would be... really good.] We learned a lot more about the beginning of the war because we were traveling with Aang. One hundred years ago when Roku was the Avatar, he and Fire Lord Sozin were best friends. They even shared a birthday. When Roku was sixteen, it was revealed that he was the next Avatar, and Roku left to start his training... and Sozin stayed in the Fire Nation to become the Fire Lord.
[It's... so hard to imagine these figures of legend and hatred as... people. But the fact that Roku is here now is proof enough of that.] Years later, when Roku returned to the Fire Nation, he and Sozin reunited. And Sozin confided in his best friend his ambition.
[She takes a sip of her tea. She's not quite looking at Ginko, but neither is she looking down anymore.] All of the nations were living in peace, but the Fire Nation had been enjoying an 'unprecedented amount of prosperity.' And with the Avatar at his side, Sozin wanted to... share that. At least, that's what he said. Roku put him off, telling him to get the thought out of his head. But Sozin never did.