As I said before, without more context, it's difficult to determine who this Big Ed is. He could be anyone from a real - life individual to a fictional character.
In 'Persona 4 Visual Novel', the gay persona might represent the diversity of the game's character creation and the exploration of different sexual orientations within the game's fictional world. It could add more depth to the relationships and storylines.
Perhaps the fanfiction focuses on the cultural clash between the two groups. The Persona 4 characters are from a small town, while the Persona 5 crew is from the big city. Their different ways of handling things and their unique Personas could lead to some interesting interactions. For example, Yu and Joker might have different leadership styles that they have to reconcile in order to succeed against the shadows.
The unique characters of Ed, Ed and Deets are what make the fanfiction interesting. Writers can explore their relationships in different ways, creating new storylines that might not be in the original source. It's exciting to see how different authors interpret these characters and the situations they can be put in.
You can try fanfiction platforms like Archive of Our Own (AO3). It has a vast collection of fanfictions from various fandoms. Just use the search bar and type in 'Ed, Ed and Deets' and it might show relevant stories. Another option could be Fanfiction.net, although the tagging system there might require some more precise searching.
A great plot could be that a new threat emerges that has the power to erase the memories of people in both Persona 4 and Persona 5's worlds. The characters from both games must work together to find the source of this threat. The Phantom Thieves could use their infiltration skills, while the Investigation Team could use their detective - like skills to gather clues. As they progress, they discover that the root of the problem lies in an ancient evil that was once sealed away but has now been awakened due to some modern - day events.
Well, without more context about the 'Big Ed and Rose story', it's hard to determine precisely who they are. They could be characters in a historical fiction, where Big Ed was a worker, like a fisherman or a miner, and Rose could be his wife or sister. Or they could be fictional characters in a modern - day story, with Big Ed being a bit of an oddball and Rose being the one who tries to understand and help him.
Yes. Persona 5 Royal adds new content that enriches the story. It has new characters and story arcs that blend well with the original plot. For example, the new character Kasumi brings a fresh perspective and her own story line that ties into the overall narrative in an interesting way.
Maybe the Velvet Room attendants from both games somehow get their worlds mixed up. Igor from Persona 5 and Margaret from Persona 4 have to work together to set things right. This leads to the characters from both games interacting. The Phantom Thieves might learn some new combat techniques from the Investigation Team and vice versa. They could then use these new skills to face a common threat that emerges from the merging of their two realities.
Maybe there's a strange distortion that merges parts of Inaba and Tokyo. The characters from both Persona 4 and Persona 5 find themselves in this strange new place. They start to notice that the Shadows in this merged world are more powerful and have new abilities. The Investigation Team and the Phantom Thieves must figure out how to adapt their Personas and strategies to fight these new threats while also dealing with the cultural differences between their two groups.