Honestly during the battle of Hogwarts I feel immensely cheated at not having more Peeves v. Voldemort time because Peeves can’t die and is a complete asshole and I just really want that interaction in my soul of how furious Voldemort would be with Peeves for just existing. Voldemort can’t banish or kill Peeves so he would be trying to direct his Death Eater troops with Peeves floating three feet to the left repeating everything Voldemort says in a mocking high-pitched voice.