Seeing the stranger before him telling him that he was there confused him, because Theo knew that, he could see. He didn't remember what the man was telling him; he remembered Greg, that they'd been lying in his bed together, but he'd woken up back in this little room.
Oh, with Greg.
"You mean Professor Snape." he pointed out, lying in against Greg comfortably, back in his Hogwarts frame of mind where he seemed to spend most of his time. "Are they letting you get a job so young? If you need money, you know I can... I..." he stammered to a halt because some dark thing was tugging at his mind, telling him no, he couldn't.
"Oh, I'm not allowed." he advised softly, his eyes faraway for a bit until he realised that Greg was old and speaking of strange things and...
"Thestrals." He almost looked and sounded like himself for a moment then. "I miss them." he said, looking up. There was no window to his room, the light emanating from some magical glow fixed into the ceiling. "I miss thestrals." he said again, the longing stark and pain-filled in his voice.