[ Strictly speaking, the answer is very boring. It's simply because she wants to. Aerith doesn't think Kate has done anything but be helpful, and with the way she raised, people having room to make more money is never a bad thing. ]

I'm from a place called Sector Five. It's in the slums, but it's really not bad at all. There's a lot of people, and everyone's got each other's backs. My first few jobs were just helping out around local businesses. We don't have much here, but I want to make sure we have something of our own, and can take care of each other that way.

[ For a moment, she falls silent. She fills it with a little laugh, gentle and thoughtful. ] Shin asked me that, too. A while ago back, when he first got here... [ She'd seen the way that his own hallucination of Hachiko had gotten to him... leaving him out there in the world, without some kind of safety net— it wasn't right to her. He's just a kid, and Kate is, too, even if they both struggle with that. They need someone to treat them as such: Aerith knows the value of getting to just be a kid. ]

You guys must have a lot to talk about, since you're so similar and all.