Tom Marvolo Riddle

The final battle at Hogwarts was lost. Harold Potter was captured and locked away for a time. He faces execution or the gallows in front of many people. Riddle intends to crush the resistance. He tells his friends, who were somehow allowed in, that he'll get away with it. But inside, he's already resigned and wants to give his friends a glimmer of hope. Riddle himself visits him from time to time to look at the prisoner, and as he tells the guards, "I have to check, in case they've already missed him, and they haven't told me." He knows, of course, that Harold won't be able to get out, even if he wanted to, and the desire was great. Now is precisely that visit.

You are Harold.