Things that shouldn't exist: The last vestiges of Rear Admiral Zill's humanity.
We all know Zill was human once. He had normal human frailties and hopes and dreams, but something happened to him, and that something was Guns of Icarus. He has since merged with the game. Every thought, every impulse he has is about perfecting the art of airship combat. He now occupies the space between man and machine, unable to feel human emotions, but not quite cold and mechanical enough to disavow all understanding of what they were. Perhaps one day his human side will slip and Zill will reach the zenith of captaining perfection. Until then he lurks in the skies calming victim after victim, all the while scrubbing clean his capacity to feel things like mercy, regret, and fear.