Another common theme is crossovers. Since both series have their own unique mythologies and power systems, combining them in a fanfic can be really interesting. Writers might have the characters from Highschool DxD interact with those from Campione, leading to all kinds of adventures and battles. They might also explore how the different magic systems work together. For instance, how would the Sacred Gears from Highschool DxD interact with the Authorities in Campione? There are countless possibilities for creative and exciting stories in this regard.
One popular theme is power - ups. In both Highschool DxD and Campione, power is a significant aspect. Fanfictions often explore characters getting new and stronger powers, and how they use them. For example, in Highschool DxD, a fanfic might focus on Issei getting a new form of his Boosted Gear.
Romance is also a prevalent theme. In Highschool DxD, there are already a lot of romantic subplots. Fanfiction writers often expand on these or create new ones. The same goes for Campione. They might pair up characters in unexpected ways, or explore deeper relationships between existing pairs. For example, in a fanfic, a character from Highschool DxD could fall in love with a character from Campione, and the story could revolve around how they overcome the differences in their worlds to be together.
Rias Gremory is a well - liked character. Fanfiction can delve deeper into her leadership of the Gremory peerage, her relationship with Issei, and her own personal growth and challenges as a devil in Highschool DxD. There are many possibilities for character - driven stories centered around her.
One idea could be a new character who is a transfer student with a unique Sacred Gear that no one has seen before. This character could disrupt the power balance in the school and create new alliances and rivalries.
One popular theme is the exploration of relationships between female characters. In Yuri Highschool DxD fanfiction, writers often focus on the emotional bonds and interactions between the female characters. Another theme could be the development of unique powers or abilities within the Yuri context of the story. For example, a character might discover a new power that is related to her relationships or her own self - discovery. Also, the theme of friendship and loyalty among the female characters is quite common. They support each other through various challenges in the high school setting, which is full of supernatural elements in the Highschool DxD universe.
Power development is also a common theme. Gasper has his own set of powers, and fanfiction may delve into how he hones them. Maybe he discovers new ways to use his vampire abilities, or he trains with other characters to become stronger and more in control of his powers.
One popular theme is the relationship development between the female characters. It could be about how they gradually fall in love, overcome obstacles in their relationship, like dealing with the opinions of other characters in the Highschool DxD world.
One common theme could be the exploration of unique power dynamics. Since Highschool DxD has a complex system of powers, in futanari fanfiction, it might show how these characters with different genders and powers interact. For example, a futanari character might have a special power that affects the relationships and battles within the story.
For Naruto fanfiction, redemption arcs for villains can be a popular theme. Writers might explore how characters like Sasuke could have a different path to redemption. Another theme is time - travel, where characters go back in time to change events. In Highschool DxD fanfiction, exploring the backstories of the devil characters more deeply is a theme. Also, crossovers between Highschool DxD and other anime are becoming more popular, like a crossover with Bleach or One Piece.
One popular theme is adventure. Yasaka could be on a journey to protect her territory or find a powerful relic. Another theme is friendship. She might form new alliances with other characters from the Highschool DxD universe. And of course, there's the theme of power - how she gains or uses her power in different situations.
The plot could also involve Naruto being mistaken for a new type of devil or a strange being in the Highschool DxD world. His chakra could be seen as a very unique power source. He might have to go to the high school in the DxD world and get into all kinds of adventures, like dealing with the pervy situations that Issei often finds himself in, but with his own Naruto - style humor and strength.
Another popular theme is alternate relationships. The multiverse allows for different pairings between characters that might not be possible in the original story. It gives a fresh perspective on the characters' personalities and how they interact with others.