Daud's also in the library, as it happens, having marked Christine's arrival but not drawing attention to himself yet -- though he may or may not stand out anyway, as this is an odd place to see a mercenary-looking tiefling, as it happens. At the small commotion, he'll actually look up from his book.

That doesn't mean he's greeting Christine just yet. He'll watch her for a few moments instead, waiting to see what she's up to.