Hermione noticed too that the castle seemed to be undergoing an extra-thorough cleaning. Several grimy portraits had been scrubbed, much to the displeasure of their subjects, who sat huddled in their frames muttering darkly and wincing as they felt their raw pink faces. The suits of armor were suddenly gleaming and moving without squeaking, and Argus Filch, the caretaker, was behaving so ferociously to any students who forgot to wipe their shoes that he terrified a pair of first-year girls into hysterics.