She ducked behind him, but really he should have expected that - it was what his sisters would do after all. Well, Ellie - maybe not Maisie, since she was supposed to be brave and all.
"Oi!" He yelled as another sludgy splash hit his face.
Peeves began singing something, and Alfie was too busy wiping his face off to really hear, except he was sure it was a limerick, and rude, and about third years."
"SIXTH YEARS!" He yelled back. Because that was really the only part that bothered him.