No. Characters in Castlevania are fictional entities within their own game - based or show - based storylines. Fanfiction is something that exists outside of their fictional world. They are engaged in their own quests, whether it's Trevor Belmont fighting vampires or Sypha using her magic to combat dark forces. Their attention is on the events and challenges within their own established story, not on fan - created works.
Yes. The Castlevania manga offers a unique visual take on the popular franchise, adding depth to the lore. It has gained a following among fans of the games and manga enthusiasts alike.
It depends on what you mean by 'real'. If you're asking if it's based on actual events, I'm not sure. Maybe it's fictional or inspired by some elements of reality.
Well, it could be quite chaotic. Some characters might be outraged at how they are misrepresented in some fanfictions. For example, if a fanfiction made Alucard seem weak or cowardly, he would likely be very angry. On the other hand, some might find the creative interpretations of their relationships, like Trevor and Sypha's, quite amusing. But overall, it would be a very strange and disorienting experience for them as they are used to their own 'official' storylines.
Greta is partially based on a true story. The filmmakers likely incorporated real-life elements and added fictional elements to make the story more engaging and cinematic.
The gore fanfic may deviate from the original 'Castlevania' story in terms of the tone it sets. The original has a certain gothic charm and a balance between action and horror. The gore fanfic, on the other hand, can be much darker and more disturbing. It can also introduce new and often more brutal interpretations of the existing characters, like making the vampires even more bloodthirsty or the werewolves more savage.