Answer:
Harry Potter was the wizard who ultimately defeated Lord Voldemort.
Harry Potter, up to his eleventh birthday, was a small, thin orphan who lived with his uncle and aunt (of which were rude and mean to Harry) and his cousin, Dudley. On his eleventh birthday, a wizard named Hagrid, a half-giant, that he was in fact a wizard. He finds out about Lord Voldemort, who killed his parents and tried to kill him when he was one year old (the spell backfired as Harry was graced with love from his mother). He goes to Hogwarts, trains to be a wizard, meets Ron Weasley and Hermione Granger, and battles his way through six years of schooling (And one year of fighting), where Voldemort comes back to life in Harry's fourth year and plots to kill Harry.