Definitely not. Harry Potter was created by J.K. Rowling as a series of books that have been adapted into movies. The story focuses on Harry's journey to defeat Voldemort, his growth as a wizard, and his relationships with friends like Ron and Hermione. There are no elements that would classify it as a 'demon supernatural fanfiction'. The magic in Harry Potter is more about the wizarding world's own rules and traditions rather than being related to demons in a fanfiction - like way.
No. Harry Potter has a rich and detailed universe that is centered around magic, friendship, and good versus evil. The series has a large number of elements such as Hogwarts School, the four houses, magical creatures, and various spells. It is a legitimate and widely - loved fictional world that has been carefully crafted by the author. It is not some sort of 'demon supernatural fanfiction' as it has its own distinct identity and themes that are far removed from such a narrow and inaccurate description.
No. Harry Potter is a well - known fantasy series about a young wizard's adventures at Hogwarts. It has its own unique magic system, characters, and storylines that are completely different from the idea of a 'demon supernatural fanfiction'. It's a world of witches, wizards, magic spells, and battles against dark forces, not related to demons in the sense of a fanfiction.