In a crossover, the interactions could be really diverse. A Persona character with healing abilities could befriend Ann, who could learn some new self - care techniques from them. Ryuji might find a kindred spirit in a more brash Persona character, and they could get into all sorts of trouble together while also having each other's backs. Joker, being the adaptable one, would be the bridge between the two groups, making sure everyone gets along and working towards a common goal, whether it's defeating a big bad or just exploring the new - found connection between their worlds.
Some characters might not get along so well. For instance, a more serious Persona character might find Joker's carefree attitude a bit off - putting. However, as they face challenges together, they would start to understand and respect each other. The Persona characters could introduce Joker and his friends to the concept of the Collective Unconscious in more detail, and the Phantom Thieves could show them how to use their skills in a more urban, modern - day setting. There would be a lot of banter and friendly competition between the two groups as they learn from each other.
The characters would likely have a mix of admiration and friendly rivalry. For example, the cool and collected protagonist of Persona 5 might be intrigued by the more laid - back nature of the Persona 4 protagonist. Meanwhile, the Persona 3 protagonist, with his more somber and serious demeanor, could initially seem a bit intimidating to the others. But as they get to know each other, they would start to bond over their shared experiences of fighting Shadows and protecting their worlds.
The characters would likely be initially cautious. For example, Yu from Persona 4 might be a bit reserved when meeting Joker from Persona 5, but as they learn about each other's goals, they would start to trust. Yosuke might be excited to see the more high - tech Metaverse compared to the TV World, and he could bond with Ryuji over their shared love for adventure. Chie would probably challenge Ann to a fight at first, thinking she's just a pretty face, but then realize Ann's strength.
Joker, the main character of Persona 5, might be initially cautious around Kirby. Kirby's round and friendly appearance might make Joker lower his guard after a while. He could then show Kirby how to use a Persona, if Kirby was interested.
Ruby would likely be very confused at first. She's used to fighting Grimm and more straightforward villains. The Joker's erratic behavior and mind - games would be a new and challenging thing for her. She'd probably try to understand his motives and find a way to stop him from causing more harm. Weiss would be distrustful right away. She's from a high - society family and the Joker's unruly nature would be completely opposite to what she's used to. She might see him as a threat not just to the world, but also to the order she values.
Harry would likely be very suspicious of The Joker from the start. He's used to dealing with threats in his own world, and The Joker's erratic behavior would set off alarm bells. Hermione would probably try to study The Joker, looking for a logical explanation for his actions and a way to counter him. Ron, on the other hand, might be a bit more fearful at first but would still stand by his friends. They would initially approach The Joker with caution, trying to figure out if he has any magical abilities or if he's just a very strange Muggle who has found his way into their world.
Deadpool would probably greet Joker with some wisecracks. He might say something like 'Hey, Mr. Crazy Face, what's up?'. And Joker would either laugh or be annoyed. They could then start comparing their methods of causing mayhem. Deadpool would talk about his guns and swords, while Joker would boast about his mind games.
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.
The Persona characters might get a more ninja - like aesthetic. For example, their school uniforms could be modified with elements like ninja tabi shoes or kunai holders. Their hair might also be styled in a more practical way for combat, similar to the Senran Kagura characters. On the other hand, the Senran Kagura characters could get some elements from the Persona world. Maybe they would have some modern - day accessories like cell phones with Persona - themed cases. Their ninja outfits could also incorporate some of the color schemes or symbols associated with the Persona characters.
One popular pairing is Joker with characters from the Persona series like Akechi. Their complex relationship in the game makes for interesting crossovers. Another is Joker with characters from other RPGs, such as Link from The Legend of Zelda. It's cool to see how their different abilities and personalities interact. Also, Joker and characters from the Final Fantasy series like Cloud are quite popular.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Persona 5 Joker crossover fanfics. Just use the search function and type in 'Persona 5 Joker crossover'. Another option is FanFiction.net. There are also some dedicated Persona 5 fan communities on social media platforms where fans might share their favorite crossover fanfics.