Faelan continued to eat in slow silence, but his stomach turned over as a chilling thought came to him. Despite his anxious desperation to find out how to get to the Department of Mysteries, he couldn't bring himself to derail this conversation. Yet his mind was stuck firmly on the veil, which made him think of Macnair, and Harry's parents, and of course, Sirius, and the things people had been saying about how those who had come back weren't really themselves. Magic could do strange things. Plus, there was polyjuice and body-switching and all kinds of magical disguises he couldn't even conceive of...
"What if he's not him?" Faelan blurted, interrupting at last. He looked between Harry and Hermione and back again. "It could happen."