One possible fanfic could be about Mika and Krul forming an unexpected alliance. Maybe they have to work together to face a common enemy that threatens both of their existences. In this story, Mika might start to see Krul in a different light, not just as a vampire but as someone with her own motives and desires.
Yes, there are quite a few. You can find them on various fanfiction websites. Some might focus on crossovers between the Naruto and Highschool DxD universes with elements from Seraph as well, like characters from different series interacting in a new high - school - like setting.
One common theme is the clash of different power systems. In Naruto, there are ninjutsu and chakra, while in Owari no Seraph there are vampire powers and cursed gear. Fanfictions often explore how these powers interact when the two universes collide. Another theme is friendship across different worlds. Characters from Naruto and Owari no Seraph have to learn to trust and cooperate with each other.
One aspect to consider in such a fanfic is the relationship dynamic. Crowley is a complex character in Owari no Seraph. When paired with a reader - insert, it can lead to interesting interactions. For example, his loyalty to his own kind might be challenged by his feelings for the reader. This could create internal conflict within him, making for a captivating story line.
A popular fanfic in this pairing is 'Shinoa's Perspective on Yuu'. In this story, it's told from Shinoa's point of view, which gives a deeper understanding of her feelings for Yuu. It shows her internal struggles as she tries to come to terms with her growing affection while also dealing with the chaos around them.
One common theme is power struggle. Since 'seraph of the end' has a complex power system among vampires, humans, and seraphs, when crossed with other universes, there is often a new power struggle. For example, if crossed with a superhero - based universe, who is more powerful - a vampire or a superhero? Another theme is survival. Both 'seraph of the end' and many other fandoms often deal with post - apocalyptic or dangerous situations, so survival becomes a key theme in crossovers.
Maybe in the crossover, a strange curse or magic affects both worlds and starts to merge them. Naruto and his comrades find themselves in a world filled with both demons and vampires. Yuuichiro and his group are also confused but quickly realize they need to work together. The shinobi could use their shadow clone jutsu to create distractions during battles against the vampires, while the vampires' superhuman strength and speed could be an advantage in the open combat scenarios in the Naruto world.
Common themes include exploration of new worlds. Since it's a crossover, characters get to explore the other universes. Also, there's the theme of identity. As characters from different series interact, they might question or redefine their own identities. For example, a Naruto character in the Highschool DxD world might have to reevaluate what it means to be a ninja. And of course, the theme of conflict is present, as differences in power, beliefs, and goals can lead to clashes between characters from the three different series.
One great Naruto and Owari no Seraph fanfiction could be one where the characters from both universes team up to fight a common enemy. For example, Naruto's ninja skills combined with the vampire - fighting abilities in Owari no Seraph could create an exciting plot. Another might be a story where the main characters from each series meet and exchange their cultures and powers. There could also be a fanfic where a character from Naruto gets transported to the Owari no Seraph world and has to adapt to survive.
In Owari no Seraph fanfic, Ferid and Mika often have a complex relationship. Ferid is a rather mysterious and powerful character. Mika, on the other hand, has his own goals and a strong will. Their interactions can range from being antagonistic to having an odd sort of understanding. Sometimes, Ferid might see Mika as an interesting pawn in his grand schemes, while Mika may view Ferid with suspicion and wariness due to Ferid's unpredictable nature.