To write a good Shirou Highschool DxD fanfiction, you should also pay attention to the writing style. Use vivid descriptions to bring the world of Highschool DxD to life, from the classrooms of Kuoh Academy to the intense battles between different supernatural beings. For the dialogue, make it sound natural. When Shirou interacts with other characters like Issei or Rias, let their personalities shine through. And don't be afraid to add some twists and turns to the plot to keep the readers hooked.
First, you need to understand the characters well. Know Shirou's personality traits like his determination and self - sacrifice from his original story, and how they would be affected in the Highschool DxD setting. Then, create an engaging plot. Maybe start with a unique situation like Shirou getting accidentally involved in a devil's plan.
Shirou would fit in as a powerful and unique addition. His combat skills and magecraft would make him a formidable ally or opponent. He could use his projection abilities to create various weapons and tools, which would be very useful in the battles that often occur in the Highschool DxD world.
One possible fanfiction could involve Shirou being transferred to the Highschool DxD world and somehow obtaining Excalibur. Maybe he has to use it to defend the school from a new threat that the regular characters can't handle on their own. This would lead to some interesting interactions between Shirou's abilities and the magic and powers in the Highschool DxD universe.
Well, there are fanfictions that explore Shirou's moral code in the context of Highschool DxD's world. For example, he might struggle with the more hedonistic and power - hungry aspects of some of the characters in DxD. He could use his skills as a hero of justice to try and bring some order or a different perspective to the battles and power plays in the DxD universe. There are also fics that focus on his relationships with the female characters in DxD, like how he would interact with Rias or Akeno, given his more reserved nature compared to the typical DxD male characters.
His projection magic can be adjusted to work with the different types of magic in Highschool DxD. For example, it could be made more powerful by incorporating demonic or angelic energy sources.
First, know both universes well. Study the lore, characters, and power systems of Diablo and Highschool DxD. This will help you create a believable crossover. For example, understand how the different races in Diablo interact and how the relationships between the three factions in Highschool DxD work.
First, you need to know the characters well. For Ben 10, understand his different alien forms and their powers, as well as his personality. In Highschool DxD, know the abilities and relationships of characters like Issei, Rias, etc. Then, create a unique plot. It could be something like a tournament where Ben's aliens compete against the supernatural beings of DxD.
First, do your research on both Highschool DxD and Devilman. Know their characters, power systems, and storylines well. Then, think of an interesting premise for the crossover. It could be something like a shared enemy or a mystery that only the combined forces of both universes can solve. Next, start with a strong opening that grabs the reader's attention, like a sudden attack or a strange discovery.
In the fanfiction, Shirou might meet a character in Highschool DxD who is also familiar with 'Kyrie Eleison'. They could bond over this shared knowledge. It could be a priest - like character who has been secretly observing the events in the DxD world. Together, they could try to use the power of 'Kyrie Eleison' to bring some sort of balance or peace to the often chaotic world of Highschool DxD.
In this fanfiction, Shirou might be seen as an enigma. His calm and collected demeanor would be different from the more boisterous characters in Highschool DxD. He could potentially be a mediator between the different groups, given his own experiences with complex moral situations in the Fate series.
One possible scenario in such a fanfiction could be Shirou Emiya's unique abilities from the Fate series being introduced into the Highschool DxD universe. His projection magic might cause quite a stir among the devils, angels, and fallen angels in that world.