[It's almost strange to be asked something like that- even though she's been here for years and been questioned many times, it still feels like something that should just be common knowledge. But she's not Underground anymore. It's something new.

She looks a little sheepish as she answers.]

Well... h-humans kind of sealed us down there, after a big war a long time ago. We've been working to get out, of course, it just... hasn't happened yet. Or uhm, hadn't when I got here. Maybe that's different now, uh-- who knows!