Battle of Hogwarts

Search for the diadem [Part 1]

"I stole the diadem. I sought to make myself cleverer, more important than my mother. I ran away with it. My mother, they say, never admitted that the diadem was gone, but pretended that she had it still. She concealed her loss, my dreadful betrayal, even from the other founders of Hogwarts."— Helena Ravenclaw recounting her past
While the battle raged on, Harry thought about possible locations of the Ravenclaw-related Horcrux. All anyone seemed to associate with was the Lost Diadem, but no one had seen the diadem in living memory. At this thought, Harry decided to ask a ghost, as they had been around much longer than anyone else. Harry found , and asked him where he might find the Ravenclaw house ghost. Somewhat miffed that Harry did not want his help, Nick pointed out the , and Harry eventually chased her down and asked if she knew anything about the diadem. After gaining her trust, she revealed that, during her life, she was 's daughter, Helena, and she stole the diadem from her mother to make herself cleverer.

She revealed that she hid the diadem in a hollow tree in a forest in , and she also ashamedly admitted to having told one other student about it, many years before. privately thought that the Grey Lady was only one of many who had been hoodwinked by 's charms. Harry put together that Voldemort found the diadem in Albania, and brought it back to Hogwarts to hide it the night he asked Dumbledore for the job. Harry then remembered that Voldemort operated alone and may have been arrogant enough to think that he alone discovered Hogwarts secret of the . Harry knew immediately that Voldemort had hidden the Lost Diadem there.