I don't have enough information to determine exactly who she is. She could be a former owner of the manor, a long - time resident, or even a ghostly figure associated with the place.
I'm not sure exactly who Margaret is without more context from the '600 lb life margaret's story'. But she is likely a person who is the focus of this particular story within the '600 lb life' series, probably someone struggling with obesity.
Well, Bly Manor is sort of a true story in the sense that it builds on the idea of haunted houses which is a concept that has been around in various forms in real - life folklore and literature. It uses the framework of Henry James' work which was influenced by real - life ideas of the time about the supernatural. But in terms of the exact events and characters in Bly Manor, they are mostly fictional creations for entertainment purposes.
Bly Manor is purely fictional. It was made up by the writers to captivate the audience with an imaginative and thrilling narrative. There's no real-life basis for it.
The Nellie Bly story is indeed true. Her adventures and achievements were well-documented and verified. She was a remarkable figure in journalism history.