I'm not sure exactly as I haven't read it. But it might be about the journey of a group of people and their relationships, perhaps with some elements of self - discovery and personal growth.
Well, Negan first appears in the series as a major antagonist. He has a very distinct personality. He's confident, often to the point of being cocky. His group, the Saviors, would extort other communities for resources. He uses fear as a tool to control those around him. His actions have a huge impact on the other characters in the show, like Rick and his group.
Well, it depends on what your story is about. If it's a personal experience, you could focus on the emotions you felt. For example, if it was a scary experience, describe how your heart was pounding and your palms were sweating. Another important thing is to use vivid language, like 'the sky was a deep, inky black' instead of just 'it was night'.
I think it indicates that Sundays are when the story reaches its final point. It could be symbolic or literal. Maybe the story's events or the characters' journey wraps up on Sundays.
Rick is a very likely character to interact with Negan in hurt Negan fanfiction. Their relationship has been a central part of the original story, and in fanfiction, their interactions could be further explored, especially if Negan is in a 'hurt' state. Another character could be Carl. Carl had his own complex relationship with Negan, and in fanfiction, their dynamic could be developed in new ways.
Well, it depends on your perspective. But generally, Negan is considered bad in the comic because of his cruel and violent actions towards the main characters.