There are fanfictions that are creative in how they cross - over the two universes. For instance, what if the Holy Grail from the Fate series was actually a powerful artifact in the Highschool DxD universe that everyone was after? Shirou, being familiar with it, could be in the middle of this epic struggle. Also, some fics are creative in the way they combine the different mythologies. Shirou, who has knowledge of various heroic spirits and their stories, could introduce new elements to the already rich mythology of Highschool DxD. This could lead to new alliances and conflicts that we wouldn't expect in either of the original universes.
One of the most creative fanfictions might be where Shirou's ability to trace weapons is used in a completely new way in the Highschool DxD world. Instead of just tracing normal weapons, he can trace the sacred gears of the DxD characters, which gives him a whole new set of powers and abilities. This could change the power dynamics in the DxD world and create a really engaging story. Additionally, there could be a fanfic where Shirou's ideals as a hero are put to the test in the morally grey areas of the Highschool DxD universe. How he navigates through situations where the lines between good and evil are blurred can be a very creative and thought - provoking concept.
A creative one could be where Shirou's reality marble from the Fate series somehow merges with the Highschool DxD world, creating a really unique and strange new setting. For example, the landscapes from his reality marble start to appear in the DxD world, and the characters have to figure out what's going on. Another creative fanfic might be Shirou being reincarnated as a devil in the DxD world but still retaining his memories and abilities from his past life, leading to some really interesting power - ups and plot twists.
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.
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.
His projection magic might be affected by the different magical rules in the Highschool DxD world. Maybe it becomes more powerful or has some new limitations. For example, projecting holy swords could have a different energy cost or be more effective against certain types of devils or fallen angels.
A plot could involve Shirou being transferred to the Highschool DxD school. He quickly catches the attention of Rias and her peerage. His different style of combat and his unwavering determination might lead to some friendly rivalries within the group. He could also introduce some new concepts of magic that the DxD characters have never seen before, like his ability to reinforce objects. And he may find himself in the middle of the power struggles between the different factions in this new world.
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.
Well, Shirou could form an unlikely alliance with some of the characters in Highschool DxD. Maybe he teams up with Issei and his group. Since Shirou has a strong sense of justice, he could help them in their battles against stronger enemies. He might also teach them some of his combat techniques, like how to better utilize their own powers.
One interesting Shirou Highschool DxD fanfiction could be one where Shirou uses his swordsmanship skills from his original story in the Highschool DxD universe to fight in the Rating Games. This would bring a new dynamic as his unique combat style would contrast with the magic - based fighting in Highschool DxD.
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.
One idea could be Shirou using his projection magecraft in the Highschool DxD world to create unique weapons during battles against the devils or fallen angels. For example, he might project Excalibur to fend off a powerful devil attack. Another plot could involve Shirou forming an alliance with Issei and his group, teaching them about his different combat techniques and how to better strategize in fights. He could also have a romantic sub - plot with one of the female characters from Highschool DxD, like Rias, where his noble and self - sacrificing nature attracts her.