Yep. There used to be one more from their group, but he just vanished. He isn't the only one who just went up and disappeared, though.

[ don't... ask him about the details about that, 'cause he doesn't even know. no one here does. but people disappear from their city all the time, only to be found as chunks of flesh on the streets, so... ]

If you could call that communication, yeah. There are also the kiosks, which are completely useless unless you somehow ask the right questions. There's also the fact that sections of this City open up little by little every month. Maybe that's their way of communicating to us, but they could've used better ways to get the words across, y'know?