D watches him and while Adrian seems to relax he remains tense... but then he's never seemed not tense so it hardly means much. He'd expected more questions, however, and finds himself oddly relieved but surprised at the fact that there aren't any.

It sounds like a dismissal in the other man's words, so he nods and moves to the sink Adrian had used in order to rinse out the empty flask and set it aside.

He should simply leave now, return Adrian to the silence and focus that he likely wishes for, but D instead lingers at the edge of the door. He doesn't look back but just pauses there.

"He made this castle, didn't he? The parts I've seen are like what castles of my time are."