Comment on today's page: yeah, you probably should have realized that being warned a nobleman was eccentric means he's weird even by the standards of nobility, but you still probably wouldn't have expected this.
Comment on today's page: Okay, my irony meter just exploded. That's actually pretty cool, given how rarely you can get that result from dramatic irony. (Seriously, "robot from space" would have been my first guess at this point even without wider context such as the first chapter, because Safehold exists.)
Comment on today's page: no, he's just observant enough to understand why you were looking at the thing you were looking at. Also, he probably came from space, and the next time you're in Twaebach the store will be an empty lot with no sign that anything was ever there, because that's how these kinds of stories tend to go.