Maybe a crossover where the Holy Grail War from Fate Stay Night somehow gets intertwined with the malevolence and the battles against it in Tales of Berseria. The Servants could have unique interactions with the daemons. For instance, Saber could mistake a daemon for a powerful enemy Servant at first and engage in an epic battle, only to realize later the true nature of the daemon.
First, do your research on both universes. Know the characters, their personalities, powers, and the rules of their respective worlds. For example, in Fate Stay Night, understand how the Servant - Master relationship works, and in Tales of Berseria, know about the different artes and how they are used. This will help you create a more believable crossover.
The idea of destiny also plays a big role. In both Naruto and Fate Stay Night, destiny is a significant concept. In the fanfictions, it could be about whether Naruto characters can change the pre - determined fate in the Fate Stay Night world, or how the Fate Stay Night characters view the idea of 'becoming Hokage' which is Naruto's big goal.
Love and friendship are also common themes. The OC might form deep bonds with the existing characters from 'Fate Stay Night'. They could fall in love with a Servant or develop a strong friendship with a fellow master. In addition, the theme of destiny is often explored. The OC's presence might change the pre - ordained destiny of the 'Fate Stay Night' world, and they have to come to terms with the consequences of their actions on the overall fate of the story.
One possible storyline could be that the dovahkiin is summoned as a Servant in the Holy Grail War. Their skills and powers from Skyrim would make them a very unique and powerful Servant. They might have to face off against other traditional Servants while also trying to figure out the rules of this new world they've been thrust into.
Yes, there are quite a few. You can find them on various fanfiction websites. Some might focus on crossovers of the characters, like how the Servants from 'Fate Stay Night' would interact with the vampires in 'Hellsing'.
A frequent theme in these fanfictions is the exploration of new identities. Kirito, being in a different world, has to re - define himself, and the Fate characters also see him in a new light. Teamwork is another big theme. They have to work together to face the challenges of the Grail War or other threats in the Fate world. And of course, the theme of heroism. Kirito's heroic nature from Sword Art Online and the heroic ideals in Fate/stay night are often compared and combined in these stories. For example, in some fanfictions, Kirito takes on the role of a hero in the Grail War, much like the Servants in Fate/stay night.
One common theme could be adventure. Sonic is all about running around and having adventures, and Tales of Berseria also has a lot of journey - based storylines. So, in fanfiction, they might combine these elements for an epic adventure.
One unique feature is the blend of different hero - spirit concepts. In these fanfics, you can see how the Servants from both series interact, like a Servant from Fate Stay Night meeting one from Fate Apocrypha and having to figure out their differences and similarities.