Filch was Hogwarts' caretaker, but he was also a squib - a Muggle born from wizard parents (which may possibly be the case of Jacob Kowalski from Fantastic Beasts as well).
Argus Filch is a Squib, a child of wizard parents who has the inability to use magic. Harry discovers this in Harry Potter and the Chamber of Secrets when he spies Filch's "Kwikspell" letter, although he does not understand what that means until Filch says in front of him and Ron, "He knows I'm...
He was born to at least one wizard parent sometime before 1951, presumably somewhere in the British Isles. Despite his magical parentage, Filch was a Squib, meaning he could not perform magic.
In around 1973, Filch joined the Hogwarts School of Witchcraft and Wizardry, succeeding Apollyon Pringle as Caretaker. During his years as caretaker, he owned a cat named Mrs. Norris. Filch waged a constant war against the students and Peeves, the school's resident poltergeist.
Harry describes Umbridge to Sirius Black, saying that she's vile enough to be a Death Eater, despite not being one. Umbridge is also depicted to be a prejudiced person, despising half-breeds and Muggle-born witches and wizards to the point of firing Hagrid due to his half-giant birth status.
He married Isobel Ross, a Hogwarts-educated witch and had several children: Minerva, their oldest child and only daughter, and two younger sons, Malcolm and Robert Jnr.
Filch joined umbridge because she represented the authority of the ministry. hes loyal and respects the law and he beleived that increased discipline was a good thing because hes bitter.
Squibs are born to at least one magical parent but have no magical power of their own. Squibs can see ghosts and Dementors, unlike Muggles. Squibs can also see and enter places that have Muggle-Repelling Charms to remain hidden from Muggles, like Hogwarts.
Cornelius Fudge: "Incidentally, can Squibs see Dementors?" Arabella Figg: "Yes, we can!" Squibs were considered different than the Muggle relatives of witches and wizards, who were ordinary people who happened to have some knowledge of the wizarding world, as Squibs did have magical blood, just no magical power.
Mrs. Norris' looming presence in the Harry Potter series is far too magical for her to be an ordinary cat, and there's enough evidence to support a theory that she's a Maledictus like Nagini. Filch's nosy cat appears all throughout the book series and occasionally in the films.
Some children were revealed as late-bloomers rather than Squibs, such as Neville Longbottom, but for others (such as school caretaker Argus Filch) their magic would simply never materialise, which could be hard to accept.
On turning eleven, Umbridge started attending Hogwarts School of Witchcraft and Wizardry. She was Sorted into Slytherin and her head of house was Horace Slughorn.
However, like in the real world, some magical members of certain families or groups have biases toward those who do not conform to a "pure-blood" status, such as being Muggle-born, a Squib or, in the case of Rubeus Hagrid, a half-breed. This prejudice may have affected the Hagrid family in a myriad of ways, but Mr.
Because, if you follow the definition to the letter, if a child has wizarding grandparents, then he IS considered a pure-blood, even if his parents are NOT wizards themselves. That would mean that someone born to two "pure-blood" squibs is a pureblood, even though both parents have no magical affinity.
It is unclear as to Lord Voldemort's attitude towards Squibs. He had personally noted throughout his life that he aims to purge Muggle-born wizards and witches for "stealing" magic. However, as Argus Filch was allowed to remain in Hogwarts, it is likely they weren't prosecuted as blood traitors.
Those who could not prove that they had magical heritage — in other words, any Muggle-born and potentially some half-bloods — were sentenced to Azkaban for having "stolen" magic. Some, however, were apparently released after being stripped of their wands and their jobs, and ended up homeless.
Hagrid was a pupil at Hogwarts himself and was learning magic along with everyone else - until one horrible day in his third year, when he was expelled (for reasons we discover later on in the series). Although he was able to stay on as gamekeeper, his wand was snapped in half.
The Harry Potter movies seem to have started this idea, since in Harry Potter and the Deathly Hallows, Filch called McGonagall "ma'am," and some audiences thought he had said "mom." Of course, there has never been any indication that these two were related.
The once shy and awkward Neville Longbottom showed his true bravery during the battle of Hogwarts and eventually became the head of Gryffindor House while also teaching new students Herbology, his favorite subject.
Later in the year, McGonagall duelled with Death Eater Alecto Carrow during the Battle in the Astronomy Tower and later learned of Snape's murder of Dumbledore. McGonagall was initially appointed as Headmistress, but was demoted after Voldemort took control of the school and placed Snape as Headmaster.
