Squibs are quite rare in the Harry Potter world. Essentially the opposite of Muggle-born wizards, Squibs are non-magical people born from at least one wizard parent. Although they do have magical blood and can interact with magical objects and see things regular Muggles cannot, such as ghosts and Dementors, Squibs aren’t capable of practicing magic in any way. Since they are often looked down upon by the wizarding community, many of them choose to live their lives as muggles and detach themselves from the wizarding world. Others choose to live somewhere in the middle, remaining allies to wizards but distancing themselves from them. Argus Filch, the foul-tempered Hogwarts caretaker, is a rare case for a Squib, as he spent his life fully immersed in the wizarding world and didn’t integrate into Muggle society.