Theo hadn't looked up when the door had opened, too used to ignoring the comings and goings of the orderlies up until they'd bodily lift him to take him away and feed him. He didn't care how many times they said that he needed to eat, he still hated it, hated that he had no control over even that.
He was angry a lot of the time about that.
So it was that he didn't turn to see Draco, his bony shoulders clearly showing how he tensed and froze in place at the sound of his name in so familiar a tone. This wasn't his sometimes visitor, the big man with the kind hands, no, this was... something other.
He shuddered like the temperature in the room had dropped suddenly but didn't move apart from that, hand still lifted to mark the wall with the pencil. "Sir." he said, his voice so quiet that it would have been inaudible if it wasn't for the complete lack of anything else in the room.