Rubeus Hagrid
Harry Potter has been treated abusively by his aunt and uncle, Vernon and Petunia Dursley and bullied by their son Dudley since the death of his parents ten years prior. This changes on his eleventh birthday, when a half-giant named Rubeus Hagrid delivers a letter of acceptance into Hogwarts School of Witchcraft and Wizardry, after Vernon and Petunia destroyed previous ones. Harry learns his parents, wizards James and Lily Potter, were murdered by the most evil and powerful dark wizard, Lord Voldemort, and Harry was sent to the Dursleys as a baby. Voldemort lost his powers after failing to kill Harry, going into exile and making Harry famous among the hidden magical community.