"Pardon me?" Albus blinked. The man was certainly not a student, but also wasn't another member of staff. And what trip? He hadn't heard of anyone due to be visiting Hogwarts this month. Not that he was privy to every coming and going in the school, but he did tend to notice those kind of things. Plus, he was relatively sure the headmaster preferred his guests to be clothed.
"Are you- are you lost?" He asked. He wondered if he should be calling someone, or at least be reaching for his wand, but it seemed difficult to be too worried about a half-asleep man who, if nothing else, seemed to be at risk of catching a chill.
He had some unusual tattoos, he noticed, not like any he'd seen before. Im fact, there were a few things that didn't seem quite right about him, in much the way the grounds and castle had seemed a little off just a few minutes previous.