Caretaker of Hogwarts school, Argus Filch was one of the least popular members of staff. Usually followed by his faithful cat and most effective spy, Mrs Norris, Filch was never far from any students causing mess or trouble and was always keen to dole out punishments for any minor misdemeanour. As a Squib, Filch had no magical abilities of his own and resented the students who found that wandwork came easily to them.