Argus Filch is a bitter, harsh, and deeply resentful man. He holds a bitter grudge against magic students and takes great joy in the strict rules of Hogwarts.As the school caretaker, Filch loves the idea of harsh punishments. He often asks the headmaster to bring back old, painful tortures like hanging students by their ankles or whipping them. Because he is a "Squib"—someone born into a magical family who cannot use magic himself—he feels left out and very angry. This pain turns into hatred for the children who can do magic easily.His only true friend is his cat, Mrs. Norris, who helps him spy on the students. Filch spends all his time walking the dark halls, looking for anyone breaking a rule. In the end, his sad and angry life makes him a lonely watcher who is feared and disliked by nearly everyone at the school.