[His eyebrows raise in surprise not at the trash can that suddenly falls over or the cats, but more like how quickly Kaveh seems to jump away from it and latch onto him, only for it to be really nothing at all. He smiles with amusement at his companion- oh, this was going to be funny and he knows it.]

Who knows? You know, the spirits of Inazuma like to pull all kinds of pranks. It doesn't matter what it is or who they're frightening, they'll even go as far as to scare small children.

[That's what he learned from Iwao and the others, at least!]

I don't see why the ghosts here would be any different.