Yes, there are some great crossovers. In these fanfictions, you might see the Phantom Thieves from Persona 5 teaming up with Saitama from One Punch Man. They could be facing a common enemy that has characteristics from both the metaverse in Persona 5 and the strange monsters in One Punch Man. For example, a powerful shadow-like being that can only be defeated by a combination of the Thieves' Personas and Saitama's strength.
Character growth is also a big theme. For example, some fanfics might have characters from One Punch Man learning about the importance of teamwork from the Persona 5 crew, or the Persona users becoming more confident like Saitama. Additionally, the exploration of different worlds is a theme. How would the normal world of One Punch Man react to the Metaverse of Persona 5 and vice versa? There are many possibilities that fanfic writers like to play with.
In Persona 5, the story of the homeless man is quite poignant. He often represents the marginalized in society. He is usually found in certain areas of the game world, just trying to get by day by day. He might not have a stable place to live but still has his own little world within the game's setting.
A common trope is the training aspect. Saitama might train the Persona 5 characters to be stronger physically, while they in turn teach him about the importance of the mental and emotional aspects of combat through their Personas. Also, the 'alternate universe' trope is popular. In these fanfictions, the worlds of Persona 5 and One Punch Man are merged in some strange and interesting ways. For example, the city in Persona 5 might be filled with One Punch Man - style monsters, and the Phantom Thieves have to adapt. This trope allows for a lot of creativity and exploration of both universes.
It could be a wild adventure. Maybe the Phantom Thieves from Persona 5 enter the world of One Punch Man. They might team up with Saitama to fight some powerful enemies that are a mix of the Shadows from Persona 5 and the monsters in One Punch Man. The different art styles and themes could blend in interesting ways, like the stylish and somewhat dark atmosphere of Persona 5 with the comical yet action - packed world of One Punch Man.
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 interaction could be full of humor and action. Imagine Skull from Persona 5 challenging Saitama to a fight, not fully understanding the extent of Saitama's power. Saitama would probably just knock him out with one punch in a comical way. But then the Persona 5 characters could show Saitama the value of teamwork and strategy, which he might not be used to in his solo fighting style. They could also introduce him to their world, and Saitama could introduce them to the strange and wacky world of One Punch Man heroes and villains.
Sure. You can check out fanfiction websites like Archive of Our Own. There are many creative works that combine the elements of One Punch Man and Persona 5. Some might focus on how the characters from the two would interact in a crossover scenario. For example, Saitama from One Punch Man could be thrown into the Metaverse from Persona 5 and his simple - minded yet powerful nature would create some really interesting situations.
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.