J.K. Rowling, author of the Harry Potter books, created her Wizarding World with a multitude of compelling characters and storylines. From fan-favorite characters such as Dobby the House Elf to less pleasant ones such as Dolores Umbridge, Harry Potter has it all. But among this vast sea of interesting personalities, one person always stuck out -- Hogwarts' Professor Snape.
Source：https://www.cbr.com/why-snape-never-killed-voldemort-in-harry-potter/
