Anduin recognizes the sound of the dragon's growl, deep and low, vibrating right through Anduin's own chest. It is a warning sound for several reasons. One, because Wrathion is demonstrating his discomfort. Two, because they really don't need Wrathion growing any more uncomfortable and then potentially transforming on them. A panicked dragon in the middle of a tower staircase is the last thing that they need just now.

Anduin shoots Hermione an appreciative glance, nodding quickly.

"Please. Yes, that sounds for the best, yes?" He turns back to Wrathion, reaching for him again, calling again on the Light since that had seemed to have helped at least a little before. "Wrathion. Come with us, let us get you somewhere safe."