Lord Voldemort (formerly Tom Marvolo Riddle) is the archenemy of Harry Potter, who according to a prophecy has "the power to vanquish the Dark Lord". Almost no witch or wizard dares to speak his name, instead referring to him by nicknames such as "You-Know-Who", "He-Who-Must-Not-Be-Named" or "the Dark Lord". Voldemort's obsession with blood purity signifies his aim to rid the wizarding world of Muggle (non-magical) heritage and to conquer both worlds, Muggle and wizarding, to achieve pure-blood dominance. Through his mother's family, he is the last descendant of wizard Salazar Slytherin, one of the four founders of Hogwarts School of Witchcraft and Wizardry.
He plays the piano.