First time posting here. Because I dislike the slow update rate, I just do a mini comic-binge about once a month so I tend to be slow on developments.
My current theory is that we're seeing the QC universe a considerable length of time in the future. Ardent and Gavia have come from Station, or the giant thing that Station will evolve into, or one of a swarm of giant things Station will evolve into.
Alice's nigh indestructibility and her devotion to the interests of the villagers are explained by the fact that she's an AI. Her chassis is significantly more advanced than the QC-era ones, but she's old-fashioned compared to the other AIs (the praesides). Of course, we know her cottage has an privy/outhouse, which counts against the non-human theory, but I'm willing to handwave that. Perhaps she just has it for guests, or just to avoid appearing even odder to the townspeople than she already does.