A prevalent theme is also the idea of identity. In Persona 5, the characters have their 'phantom thief' identities. In One Punch Man, Saitama has his own identity as a hero. Fanfictions might explore how these identities would be affected when the two universes collide. For instance, would a Persona user be able to keep their identity a secret from Saitama? And how would Saitama's identity as a hero be perceived in the world of Persona 5?
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.
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.
A common theme is the clash of powers. Since Deku has his own set of powers from My Hero Academia and he's in the One Punch Man world, there's often exploration of how his powers compare to the likes of Saitama's. Another theme is adaptation. How does Deku adapt to this new and very different hero environment.
One common theme is power comparison. Since Saitama has such overwhelming power in One Punch Man, fanfictions often explore how that power stacks up against the Huntsmen and Huntresses in RWBY. Another theme is the clash of different worlds. The modern, somewhat comical world of One Punch Man and the more fantasy - based RWBY world coming together creates interesting scenarios.
The theme of adventure is also prevalent. Fangirls take their characters on adventures through the various locations in the One Punch Man world. They might explore the strange and dangerous places, face off against powerful monsters, or uncover secrets about the world that weren't known before. This allows for a lot of action and excitement in the fanfiction, and it also gives the fangirl character a chance to prove herself and grow.
One common theme is power and powerlessness. In the context of slavery, characters who are slaves often lack power, while those in control have a lot. This is interesting when compared to the normal One Punch Man setup where Saitama has all the power.
One common theme is power comparison. Writers often explore how Gohan's power from Dragon Ball would stack up against Saitama's in One Punch Man.
One common theme is the clash of power levels. One Punch Man is known for its extremely powerful characters like Saitama, while Undertale has a range of characters with different abilities. Fanfictions often explore how these different power levels interact. For example, how would Saitama's one - punch ability fare against the powerful bosses in Undertale? Another theme is the exploration of different worlds. The two universes are very different, and fanfictions like to play with the idea of characters traveling between the two. It can be a really interesting concept as they bring their own cultures and values with them.
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.
One common theme is the exploration of Saitama's power in different universes. For example, when he crosses over to a universe with magic, how his physical strength compares to magical abilities.