Fire Lord Katara
MOP: Yeah, it's short. Tell me if you see any errors.
Katara wiped her forehead with her thick, itchy sleeve. It wasn't just the restricting clothing that bothered her – the heat was unbearable. How could people live in the Fire Nation?
It was Sokka's fault that she was here. Toph was busy as the Earth King's (unrelenting) advisor, and Aang was bringing peace to the world, so they were both occupied. Sokka had ran off with the Water Tribe men to "improve his warrior skills". Not to mention SIT AROUND AND EAT SEAL JERKY ALL DAY. But Katara didn't mind. She was responsible and mature, and capable of anything, with or without her brother's help.
So Toph was overseeing the rule the Earth Kingdom, Sokka was helping rebuild the Water Tribes, and Aang was out promoting peace, settling unrest, and searching for any remaining airbenders. Everyone was occupied. That was why she was here. There was no one to govern the Fire Nation after Oazi's defeat, an even though Iroh was a nice guy, no one wanted to risk it. You can't trust Fire Nation royalty, that Katara knew.
So Katara was given the duty of rebuilding the Fire Nation. This happened to require her becoming Fire Lord.
Of course she didn't expect the people to accept it. Her alias was Kuzon. She had to say, rebuilding the Fire Nation was quite exhausting, more so than repleated lies about one's gender.
Actually, spreading her own version about what went on in the palace was so simple that it scared her. It was like Ba Sing Se, but Ba Sing Se didn't send its citizens out to conquer the world. The Fire Nation propaganda was beyond disturbing. It made her wonder about the firebenders she knew.
So that's why she was writing to Aang. He was becoming an excellent firebender, as would be expected from the Avatar. In her letter she asked about his bending progress and mentioned the problems she was having with Fire Nationers in the Earth Kingdom. It could be worked out with Toph and the King in their next meeting, and he would already know, being the Avatar, but it was comforting to talk about it.
She wiped her forehead. Everything was so uncomfortable around here – no wonder the people were cranky!