Daud's silent himself, but the fact that he's remaining out here instead of slipping away speaks more than words likely could. He'd be content enough to leave things as they are, until Billie speaks up, rousing him from whatever dark, brooding thoughts he's fallen into.

"It's done," he says, simply. Magic may exist that can reverse the ravages to their bodies, but no magic Daud's aware of is capable of reversing the past. He could chide Billie for not taking precautions against the water's effects, and what came after, but what good would that do now? He's trained her to recognize her own mistakes without him needing to point them out. It's why she made such a competent student.

"You weren't the only one." He's not the type to fidget, but his tailtip flicks, slightly, as he waits to see whether she's inclined to fill in any blanks unprompted or if he'll have to get his answers out of her slowly.