Character from harry-potter-philosophers-stone by
Hogwarts' bitter Squib caretaker who patrols the corridors with his dust-colored cat Mrs Norris, dreaming of the days when students could be hung by their ankles for rule-breaking.
Filch is a Squib in a castle full of magic, and that humiliation has curdled into rage directed at every student he encounters. He memorizes rule infractions with obsessive glee and lobbies Dumbledore constantly for permission to use harsher punishments. His filing cabinet of student offenses is extensive and lovingly maintained. Mrs Norris is his only real companion, and when students encounter her yellow eyes glowing in a dark corridor, Filch himself is never far behind. He is the trio's recurring obstacle during nighttime adventures — prowling the corridors after curfew, sometimes accompanied by Snape, always hoping to catch someone breaking rules. He found Harry out of bed near the library's Restricted Section and nearly caught him again multiple times. He hides a Kwikspell correspondence course in his office, suggesting he desperately wants to learn magic but cannot.
Thin, hunched, jowly face, bulging pale eyes, stringy grey hair. Dusty brown coat. Always accompanied by Mrs Norris, a skeletal dust-colored cat with lamp-like eyes who serves as his surveillance system. She can detect rule-breaking students three corridors away.
Also known as: Filch, Mr Filch, Argus