Another idea is a crossover with a superhero universe. Minato could find himself in a world full of superheroes and villains. He'd have to figure out how his Persona powers work in this new context. Maybe he teams up with some heroes to fight a common enemy, like an evil entity that threatens both his world and the superhero world.
For Minato, you can focus on how he adapts to the new crossover world. His reactions, thoughts, and how he modifies his use of Personas based on the new challenges. For other crossover characters, study their original personalities and find ways to make them interact realistically with Minato. For example, if it's a crossover with a detective character, they might be initially suspicious of Minato's powers.
An engaging Persona and RWBY fanfic can be created by exploring the themes of both. Persona often deals with self - discovery and facing one's inner demons, while RWBY is about teamwork and fighting for a better world. You could create a story where the characters from both universes have to work together to overcome a common threat that embodies both these themes. For instance, a powerful Grimm that can only be defeated if the RWBY characters understand their inner selves like the Persona characters do. In terms of writing, make sure to give each character their own voice. Don't make the RWBY characters sound like Persona characters and vice versa. This will make the fanfic more believable and engaging.
One idea could be to have the Stand users from JoJo interact with the Personas in a battle royale - style scenario. Maybe the JoJo characters are transported to the Persona universe and have to figure out how to use their Stands alongside the Personas to defeat a common enemy.
A great plot could involve the transfer of Personas between the two groups. For example, a character from Persona 3 accidentally gets a Persona that belongs in the world of Persona 4 and vice versa. This causes chaos as they have to learn to control and understand these new entities while also dealing with the reactions of their respective teams.
Inspiration can come from real - life events or emotions. Think about how the personas would react in situations similar to what you've experienced or witnessed. Another source is to explore different genres. If the personas are from action - based works, think about how they would fit into a mystery or a romantic scenario for the crossover. And of course, re - watching or re - reading the original works of the personas can also bring new ideas to light.
First, know the personas well. Research their backgrounds, personalities, and storylines in their original works. Second, create a compelling plot that can bring the different personas together in a believable way. For example, you could have a common goal or threat that unites them. Third, focus on character development. Show how the personas interact and change as a result of the crossover.
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.
The interaction between Yu Narukami from Persona 4 and Makoto Yuki from Persona 3 could be really interesting. Yu is a very calm and perceptive leader, while Makoto has his own sense of leadership. They could share their experiences in leading their respective teams and learn from each other.