Perhaps Shinji Ikari could be reimagined as a devil in the Highschool DxD world. He would have to adapt to the devil society, with its hierarchies and power struggles. His introverted nature might be a contrast to the more flamboyant devils, and his journey to find his place within this new world could be a central part of the fanfiction.
One idea could be that Shinji Ikari is transferred to the Highschool DxD school as an exchange student. He might initially struggle with the very different supernatural environment compared to his Evangelion world. His experiences with Angels could give him a unique perspective on the devils and other beings in the Highschool DxD world, leading to some interesting interactions and storylines.
He could also become more social. In the Highschool DxD world, there are many different species and characters to interact with. Shinji, who is often isolated in Evangelion, might start to open up and form friendships or alliances. This would be a big change from his usually withdrawn personality.
One idea could be a crossover with a superhero universe. Shinji Ikari could gain superpowers and have to navigate the complex world of superheroes, dealing with their moral codes. Another could be a crossover with a fantasy world like Middle - earth. He might find himself on a quest with hobbits or elves. A third idea is a crossover with a post - apocalyptic world, where Shinji's experiences in his own apocalyptic - like setting of Neon Genesis Evangelion could be put to use in a different kind of desolate landscape.
One idea could be that Naruto is somehow transported to the world of Highschool DxD. He could use his ninja skills and chakra in the new world, maybe even teach some of the characters there a thing or two about combat. For example, he could show Issei how to better control his power using chakra control techniques.
These fanfictions expand the Highschool DxD universe by introducing new characters like male Nekoshou. For example, they can create new storylines around their powers and how they interact with the existing characters in the DxD world. It might be a male Nekoshou with a special ability that changes the power dynamics in the school.
Yes, there could be such fanfictions out there. Fanfiction writers often like to cross over different popular franchises, and combining Naruto and Highschool DxD in this way is not unheard of. It allows for some really interesting character interactions and plot developments.
There are fanfictions where Shinji Ikari has different relationships with the other characters. In some, he forms a closer bond with Asuka earlier on and they work together more effectively against the Angels. This changes the whole dynamic of the story as their combined strength and new - found friendship alters the course of events.
First, understand Shinji's character well. He is a complex and often troubled character. Know his insecurities, his relationships with others like Misato, Asuka, and Rei. Then, come up with a unique plot. It could be a what - if scenario, like what if Shinji was the first to fully understand the true nature of the Angels?
First, you need to have a clear idea of the other universe or story you want to cross over with. If it's a well - known one, study its lore, characters, and settings. Then, think about how Shinji Ikari would fit into that world. What would his role be? For example, if it's a magical world, would he be a reluctant hero or a confused outsider? Next, plan out the basic plot. How will the two worlds collide? And finally, start writing, don't worry too much about making it perfect at first.
The OC, as the Son of Sparda, could fit in by being a new and powerful entity. He might be initially seen as an outsider, but his powers would quickly draw attention. He could become involved in the power struggles between the different factions in Highschool DxD. For example, the devils might try to recruit him, while the angels might be wary of his presence. His unique abilities would also make him a valuable ally or a fearsome opponent. And in the high school setting, he could be a bit of an enigma to the other students, both human and supernatural.
One idea could be that the characters from Highschool DxD end up in the Hellsing universe. Maybe Issei and his friends are mistaken for new types of vampires due to their devil powers. They then have to team up with the Hellsing organization to clear their names and also fight against a common enemy that is threatening both the devil and human worlds in this combined universe.