Well, the plot could involve Shirou and Artoria being transferred to the High School DxD world. Maybe they would have to deal with the devils, angels, and fallen angels there. Shirou's combat skills and Artoria's power would surely make an impact. They could form alliances or even find themselves in the middle of the three - faction conflict.
Shirou's projection magic could be really useful. He could project powerful weapons from the High School DxD universe or even combine his projections with his existing skills. Artoria's Excalibur would be a very powerful weapon. Her magical abilities would likely be on a par with some of the high - level devils or angels in terms of raw power. They could both use their powers to protect themselves and those around them in the often - dangerous world of High School DxD.
The theme of growth is also prevalent. Both characters usually develop throughout the story. Artoria might become more open and trusting, while Shirou could become stronger and more confident. This growth is often tied to their relationship, as they support and inspire each other in the fanfiction.
Well, in Archer fanfic involving Artoria and Shirou, their relationship can be quite different from the original story. Sometimes, Shirou might be more influenced by Archer's combat style when dealing with Artoria. Artoria, on the other hand, could see elements of the future (as Archer is from a future timeline) in Shirou. This can lead to new storylines and character growth. It can also make for some very engaging reading as the fanfic writers play with the existing character dynamics and add their own twists.
In Archer - themed fanfic, Artoria and Shirou can play various roles. Artoria might be a key figure in a quest that Archer and Shirou are involved in. Her knowledge and power could be crucial for the success of the mission. Shirou, influenced by Archer, could have a different approach to working with Artoria compared to the original story. For example, he might be more cautious or more aggressive depending on what he has learned from Archer.
In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.
Unique plot twists. Instead of following the typical storylines, a fanfiction that has unexpected turns related to their relationship can be very engaging. Maybe a situation where they have to face a threat that challenges their loyalty to each other in a completely new way. It could be a magical curse that makes them question their roles.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). There are a plethora of stories there. Just search for 'Master Artoria and Servant Shirou' in the search bar, and you'll get a long list of fanfictions to choose from. Many of them are well - written and explore different aspects of their relationship within the story's plot.
One great lancer artoria x shirou fanfiction is 'A Bond Beyond Worlds'. It beautifully explores their relationship, with detailed descriptions of their interactions and how they grow closer over time.
One possible fanfiction could be about Naruto characters attending the school in High School DxD. For example, Naruto's positive and determined attitude might clash with the more complex social and power dynamics in the DxD world. He could make new friends or even rivals among the devils, angels, and fallen angels.