There is an explanation for this.
It's not one anyone could reasonably have deduced, as it is an indulgent one that has to do with my own ranting opinions about "a thing", but it's not random, and we'll get to it soon.
Susan't reaction in panel one was pretty much my own until I stopped and thought about it. Even knowing of an infamous marksman adventurer, there'd be no guarantee that they're THE "ranged hero", and seer-nonsense would be as good a way to know for sure as any.
That said, it still feels a bit "yes, them, obviously them, how was this a mystery?"