Well, in persona 5 crossover fanfiction, the idea of bringing in characters from different anime can be really cool. Like, if a character from Naruto were to enter the persona 5 world, their ninja skills would interact in fascinating ways with the persona abilities. Also, the crossovers can often explore new storylines that deviate from the original persona 5 plot, which gives a fresh perspective on the game's universe.
In persona 5 crossover fanfiction, a great concept is the melding of different art styles. For instance, if there's a crossover with a more light - hearted and colorful anime like Sailor Moon. The contrast between the darker, more modern - day Tokyo setting of persona 5 and the magical girl aesthetic of Sailor Moon can create some really engaging and unique visual and narrative combinations. It can also lead to interesting character interactions, like the Phantom Thieves trying to understand the magic of the Sailor Scouts and vice versa.
One interesting concept could be the crossovers with other popular game universes. For example, a crossover with the Final Fantasy series might bring in unique magic systems and character classes. Another concept could be the exploration of different personas in unexpected combinations. It allows for creative interpretations of the characters' personalities and powers.
One interesting concept is the clash of different personas' powers. For example, when a persona from one game crosses over into another's world, their unique abilities can create unexpected story developments. Another concept is the interaction between the characters who control those personas. Their different personalities and backstories can lead to interesting dialogues and relationships.
One idea could be the characters from Persona 4 and Persona 5 swapping their worlds. So the Phantom Thieves end up in Inaba and have to deal with the Midnight Channel mystery. And the Investigation Team finds themselves in Tokyo and gets involved in the Metaverse. It would be really cool to see how they interact with the different environments and characters.
One interesting concept could be the fusion of the Persona summoning system with the Servant system in Fate Stay Night. Imagine a character being able to summon both a Persona and a Servant, and how that would change the power dynamics and strategies in battles.
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.
In this fanfiction, an interesting idea is the customization of Personas by the Highschool DxD characters. Since in Persona games, you can customize and evolve your Personas, it would be exciting to see how the characters in Highschool DxD would do the same. Maybe they would use their devil powers or unique skills to modify their Personas, creating really powerful and unique combinations for battles and challenges.
A really interesting plot could involve a new threat that emerges and can only be defeated by combining the powers and skills of the Persona 3 and 5 characters. For example, the combat styles of the two groups are different. The SEES members are more used to fighting in the Dark Hour, while the Phantom Thieves operate in the cognitive world. They would need to learn from each other's strategies. And on a character level, the more serious and reserved characters from Persona 3 could interact with the more flamboyant and confident characters from Persona 5, leading to some really interesting dialogue and relationship building.
Maybe there's a situation where the Velvet Room attendants from Persona 3, 4, and 5 realize that there's a threat to the collective unconscious that only the combined efforts of the three protagonists can stop. So, they somehow manage to bring the characters together. The characters then start to learn from each other's combat styles and ways of forming bonds with their friends, which helps them in their fight. For example, the protagonist of Persona 3 could teach the others about his experiences with death and how to face it head - on in battle, while the Persona 4 protagonist could share his knowledge of reading people and finding the truth behind the mysteries. The Persona 5 protagonist could contribute with his skills in stealth and infiltration.
A great concept for a 'jojo persona crossover fanfiction' would be a tournament - style story. Characters from both universes are forced to participate in a battle royale. The Jojo characters would bring their Stands, and the Persona characters would have their Personas. The battles could be intense, with different strategies emerging. For instance, a Persona user might try to use psychological attacks against a Jojo character who is more used to physical combat with their Stand. And the story could also explore how the two groups of characters interact and form alliances outside of the battles.
A great plot for Persona 4 crossover fanfiction could be a crossover with the 'Sword Art Online' universe. The Persona 4 gang could be trapped in the virtual world of SAO and have to use their Personas to defeat the bosses and escape. Or, they could cross over with the 'My Hero Academia' world. Here, they could attend the hero school and learn new ways to use their powers, while also sharing their Persona knowledge with the MHA characters. Also, a crossover with 'Harry Potter' would be interesting. They could attend Hogwarts and discover that their Personas have unique interactions with magic.
A crossover with a post - apocalyptic world setting. The Persona 3 characters find themselves in a world destroyed by some great cataclysm. They have to use their Personas not only to fight the Shadows that lurk in this new world but also to survive against other desperate survivors and new, mutated threats. They might also have to find a way to restore the world using their Persona powers.