The caretaker of Hogwarts. He's old, detests students, and longs for the days when he used to be able to whip students or chain them in the dungeons. He adores Umbridge because she promises to bring back this kind of punishment and also promises to get Peeves, his nemesis, thrown out of the castle.
Filch Character Timeline in Harry Potter and the Order of the Phoenix
The timeline below shows where the character Filch appears in Harry Potter and the Order of the Phoenix. The colored dots and icons indicate which themes are associated with that appearance.
...detention. She praises his bravery. As Harry helps her secure her parcel to an owl, Filch bursts in and accuses Harry of ordering Dungbombs. He's enraged when he learns that Harry... (full context)
In Charms, Harry and Hermione discuss that Umbridge is reading Harry's letters. She says Filch's Dungbomb accusation was probably a cover story to read his mail. She successfully silences her... (full context)