Considering what Zuko was used to he probably should have been far more upset and calm. In fact, if he were a bit younger he probably wouldn't be nearly as calm as he were right now. He didn't quite understand everything that was going on with the other people that were here. He didn't have to understand it, though. Understanding would come with time. Right now, Zuko's biggest concern was to remain calm and deal with the things that were happening. He had learned this! It was something that Uncle had taught him that would stick with him forever.
He was dealing with being here! He'd already made friends, sort of. He would be able to adjust!
Hearing a voice, Zuko automatically spun around in his pacing to look at the speaker. It shouldn't have surprised him that it was his sister. Still, he could have done without seeing her. "Yes, Azula, tea." He stated, his voice a deadpan. She could plainly see that he was brewing tea, it wasn't difficult to see at all. "I'm aware Uncle isn't here, Azula. I happen to enjoy drinking tea, Azula." Zuko stated evenly, attempting to remain calm. His sister was someone that always managed to get to him. "It's hardly hard. Uncle didn't figure everything out for me, despite what you think." He tacked on, rolling his eyes.
Looking at his sister, Zuko couldn't help the frown on his face. "Would you like a cup of tea, Azula?" Somehow he couldn't imagine his sister enjoying a cup of tea.