Question: what are the evil ghosts in harry potter?
Answer: 1 The Dementors. These robed, evil beings couldn't Avada Kedavra you, even if they wanted to. 2 Voldemort. ...  3 Bellatrix Lestrange. ...  4 Dolores Umbridge. ...  5 Fenrir Greyback. ...  6 Professor Quirrell. ...  7 Lucius Malfoy. ...  8 Aragog. ...