She smiled at Toph's answer. "He'll be fine," she stated, with a lot more reassurance in her tone than she actually felt. Her brother had a knack for getting into trouble, after all. She hoped he'd be okay without someone around to help him get back out of it. Or, who knew? Maybe he'd show up here, too. Then it would be almost like it was back home.
Almost.
Refusing to dwell on depressing thoughts for a moment longer, Katara turned back to Toph. "Zuko destroyed a car right after we arrived. They're mostly made of metal from what I can tell, so breaking them isn't that hard. People get angry when you do, though," she stated, deciding to get back to the topic at hand. It never occurred to her that she'd just spoken about the Fire Nation prince in such a casual fashion, or how strange that would sound to someone who hadn't seen the pseudo-working relationship they had developed recently.
"Speaking of people," she went on without missing a beat, voice lowering slightly as a man and woman passed by them on the sidewalk. "There are... creatures here. Monsters, really. Real ones. I was staying with some people who fight them, helping them with my waterbending. They're nice. The people I mean, not the monsters. They're dangerous, so you need to be careful."
Granted, Katara knew Toph could more than hold her own and, really, out of all of the elements to go up against most of the demons in this city, earthbending was probably going to prove the most effective since hardly anyone was immune to giant boulders crushing them to death. But that didn't mean that Katara wanted to see her friend take them lightly, either. Eventually, she knew, she probably would come up against a creature that she couldn't fight on her own. That was just how this city worked, it seemed.