Well, 'Harry Potter' is a world - famous series about a young wizard and his adventures at Hogwarts. Fanfiction usually means that someone is taking the existing characters or concepts from that series and creating their own story. But this 'szayel' is really a mystery here. Maybe it's a new character someone has made up in their fanfic world, and they are trying to integrate it with Harry Potter in some unique way.
The statement 'harry potter is szayel fanfiction' is quite puzzling. 'Harry Potter' has its own rich lore, characters, and storylines. Fanfiction based on it can vary widely. Since 'szayel' is not a common term associated with Harry Potter, it could be a personal or a very small - community - known concept. It might be that the author of this fanfiction is using 'szayel' as a plot device, a new magical creature, or even a new character with special abilities that interact with the Harry Potter universe in ways that are not traditional or well - known.
I'm not entirely sure what 'szayel' specifically refers to in this context. It could be a very niche or misspelled term. 'Harry Potter' is a well - known franchise, and if this is fanfiction, it might be someone's very strange or creative take on combining elements of Harry Potter with something related to 'szayel', but without more information, it's hard to say precisely.