"Harry Potter and the Deathly Hallows" reveals that the Grey Lady is Helena Ravenclaw, daughter of Rowena Ravenclaw, making her the only house ghost known to be related to one of the Hogwarts founders. She informs Harry that she stole the Diadem of Ravenclaw from her mother, in an attempt to become smarter than her, and then went into hiding in Albania. It was a dying Rowena Ravenclaw's wish to see her daughter again, and so she sent for the Bloody Baron to look for her, knowing that he would not rest until he brought her back, partly because he was in love with her. However, she refused to come with the Baron and, in a moment of blind rage, he killed her with a single stab-wound to the chest. Overcome with remorse, the Bloody Baron killed himself using the same weapon in turn and wears chains as penitence, "as he should", the Grey Lady says. The diadem remained in the hollow of a tree in an Albanian forest until Tom Riddle managed to charm the story out of the Grey Lady. Riddle, who had been seeking historically significant objects to make into Horcruxes, later retrieved the diadem from Albania and hid it in the Room of Requirement at Hogwarts while visiting the castle years later.