- Are Topsy and Turvey also creations, or are they something different? (Since they look relatively normal compared to the rest of them)
( vvv answering question for myself vvv )
The Web is a Magnus Archives thing! tl;dr there are various fear-based entities/powers that control the supernatural events in the story, with the Web being one of the most active in terms of being actually 'sentient'. The Web is based on the fear of Spiders, but also of your will not being your own, being controlled, and of being manipulated (akin to a spider weaving a web to catch its prey). Because of this, the Web sort of has a thing where because the fear is of being controlled or manipulated, the entity itself and its disciples have to be fairly cunning schemers.
It also tends to manifest as addictions, due to the way in which people seem to be 'trapped' in them almost akin to a spiderweb. She's an avatar of it, meaning she's sorta a disciple of the paranormal entity.