I undid the edit you made on the Stilton Manor page because it wasn't linked properly.
That being said, are you certain Grim Alex was even there at that time? From my understanding (and I could indeed be completely wrong about this), Grim Alex came along after Delilah was summoned back, or at least Luca's association with her.
If I'm incorrect, then feel free to re-add the information with the proper link.
As for fanfiction, you can update an existing blog post and add a new chap. OR you can host the story outside the wiki, for example here, and update your blog post with links to the respective chapters.