Severus Snape is the most controversial character in the saga. Potions teacher (1981–1996) and Defense Against the Dark Arts (1996–1997), Head of Slytherin House from 1981–1997, and later Headmaster of Hogwarts School of Witchcraft and Wizardry from 1997–1998, both a Death Eater and a member of the Order of the Phoenix. His double life played an...Read more