When the Batman speaks, Aaron freezes. Sucks in a harsh breath through his teeth. But the Batman doesn't sound at all feral, or bearing any ill-will, so Aaron unfreezes enough to walk forwards a step.

"Call me a hoarder." Humor. Dry, sarcastic humor. "Why are you here?"

He sounds younger. Looks it, too, if the Batman cares to turn around. The surroundings stay hazy and blurred but for the objects closest to the Batman. "...what are you?"