There he pauses, and now it's clear he sees something, at least. While it's not in his nature to speak much to people he can see, he feels obligated in this case, as silly as it seems.

"Hellsing's guild hall is not a suitable place to wander or haunt," Rodolphus says flatly. It figures that the one person so far who can see Dean scolds him for being around. "I suppose you cannot speak. I'll inform someone."