Well, in fanfiction, anything can happen. Just because it says Harry is Uryu's brother doesn't necessarily mean it's going to be a traditional brother relationship. It could be a metaphorical brotherhood, or it could be a result of some crazy plot device like a cross - over between two different universes. So, it really varies from one fanfiction to another.
I'm not sure specifically which 'Mayuri novel' you are referring to. There could be various reasons for deaths in a novel, such as battles, diseases, or sacrifices. Without more context about this particular novel, it's difficult to list all the deaths.
I'm not sure specifically what the'mayuri judgement original story' is as it could be something very specific or from a niche context. It might be a story about a character named Mayuri and some sort of judgement that takes place within the narrative.
The description of deaths in the Mayuri novel would depend on the author's writing style and the purpose of those deaths in the story. If the author wants to evoke strong emotions, the death descriptions might be long and heart - wrenching. If it's a fast - paced adventure novel, the deaths could be quickly described to keep the action going, like 'With a swift blow, the character was no more.' Without reading the actual novel, we can only speculate on how the deaths are described.
No, I don't think so. Harry Potter has its own huge and well - established fanfic community, but this specific idea of 'harry potter is mayuri fanfic' doesn't seem to be something that's widely known or talked about in general Harry Potter fandom.
One great ichigo x uryu fanfic is 'Bond of Souls'. It beautifully explores their relationship as they face a new and powerful enemy together. Their friendship is depicted in a very heartwarming way.
Another theme could be their place within the overall story's world - building. They might be involved in plots that revolve around the power dynamics or the scientific/magical aspects of their world. In fanfiction, this can be expanded upon, showing how they navigate through these elements together, without necessarily delving into inappropriate content.
Since I don't know the exact'mayuri judgement original story', I can't say for sure who the main characters are. But surely Mayuri is likely to be one of the main characters as the story is named after her.
It's a bit of a mystery at first glance. 'Harry Potter' is a global phenomenon, and fanfic is when fans create their own stories based on existing works. 'Mayuri' could be a person's username, a character in another series, or something else entirely. It could mean that there is a fan - written story that features elements of Harry Potter in a way that is related to this 'Mayuri', perhaps as a character in the fanfic, or as an idea that the fanfic is centered around.
Neliel could be a great choice. She has a more gentle and kind nature compared to many other Arrancars. Her unique appearance and backstory would make for an interesting dynamic with Uryu. She could potentially teach Uryu about the different aspects of Arrancar existence that he may not be aware of.