" I know [Umbridge] by reputation and I'm sure she's no Death Eater—'
'She's foul enough to be one…'
'Yes, but the world isn't split into good people and Death Eaters', said Sirius with a wry smile. 'I know she’s a nasty piece of work though'. "

― J.K. Rowling , Harry Potter and the Order of the Phoenix (Harry Potter, #5)