A fanfiction could also focus on an alternate universe where Kenshiro and Yuria have different roles. For example, Yuria could be a powerful fighter alongside Kenshiro, and they could fight against a common enemy in a more equal partnership.
In a Kenshiro x Yuria fanfiction, their relationship could be the central focus. Their love could be tested by various challenges, like rivalries from other characters who are jealous of their bond.
One popular idea could be a Kenshiro crossover with the Dragon Ball universe. Imagine Kenshiro facing off against Goku or Vegeta. Another idea might be a crossover with the Naruto world, where he teams up with Naruto to fight common enemies. A third could be a crossover with the Berserk universe, with Kenshiro and Guts having to survive in a dark and dangerous world together.
In such a fanfiction, they might have an epic battle at first. Saitama's overwhelming strength and Kenshiro's powerful martial arts could clash. Then, they could realize they are both on the side of justice and team up to fight a greater evil, like a powerful alien or a dictator ruling over a post - apocalyptic world.
First, you need to know the characters well. Understand Kenshiro's personality, his skills, and his code. Then, research the other universe you want to cross him over with. Figure out how the two universes can interact. For example, if it's a crossover with the Star Wars universe, think about how Kenshiro's martial arts would work in a world of the Force. Don't forget to have a clear plot, like a common enemy that both Kenshiro and the characters from the other universe need to face.
It's really hard to say. Saitama has shown that he can defeat any opponent with a single punch. But Kenshiro is also extremely powerful in his own right, with his martial arts skills. However, if we consider Saitama's ability to break any limit, he might be stronger in a direct confrontation.
Power dynamics is a common theme. Yujiro is often depicted as extremely powerful, and the relationship with the OC can be shaped by this. For example, the OC may be in awe of his strength or try to prove themselves equal to him.
When writing a Harry Potter and Yujiro Hanma fanfiction, it's important to establish the rules of the combined world early on. Will Yujiro be able to use magic? If not, how will he defend himself against magical attacks? You can also play with the idea of cultural differences. Yujiro comes from a very different kind of world compared to the wizarding world. This can lead to some interesting misunderstandings and comical situations. For instance, Yujiro might think the Sorting Hat is some kind of strange creature trying to attack him and try to fight it off. As you write, keep the pacing right, not too slow or too fast, and make sure the story has a satisfying ending, whether it's a happy ending or a more bittersweet one.