"You’ve got me there – I figured we’ve got to find a silver lining in all this somewhere," he gestured helplessly to the room at large, and their previous levity vanished, and suddenly all that remained was Draco, Harry, and the ghosts that haunted them. The sound of Draco’s vanished wife playing piano floated through to them from the study, and Harry realised abruptly that, though they had chosen different methods - Draco by doing well in school, and Harry by tormenting Umbridge - they were trying to achieve the same thing: control.