One possible idea for this fanfiction could be Naruto being transported to the world of High School DxD. He might end up attending the same school as Rias. Given Naruto's strong sense of justice and his combat skills, he could quickly become involved in the supernatural battles and power struggles in that world. He might also form an interesting relationship with Rias, perhaps starting as friends and gradually developing into something more as they face various challenges together.
A possible plot in highschool dxd gremory bashing fanfiction is the exploration of the Gremory family's past secrets. Maybe there are dark secrets that, if exposed, could damage their reputation and power. A fanfiction could revolve around a character who discovers these secrets and decides to use them against the Gremory family. Or perhaps a situation where the Gremory family is faced with a new type of enemy that specifically targets their weaknesses, which are revealed as the story progresses.
One interesting crossover could be the sharing of combat techniques. For example, Naruto's shadow clone jutsu might be used in the Highschool DxD universe in a creative way during battles. It could help in confusing opponents just like how it does in the Naruto world.
Issei is often involved. Since he has a connection to the Gremory family through Rias, his actions and decisions can sometimes be a part of the Gremory - bashing scenarios. Another could be Sona, as her family has a relationship with the Gremorys and she might be in a position where she has to take a stance against them in some fan - created situations.
It's hard to say for sure, but Naruto himself could be a strong contender. His vast array of jutsu and his ability to grow in power constantly could make him extremely powerful. He has faced incredibly tough opponents and come out on top in the Naruto universe, so in a merged universe, he could use his skills to take on the devils and other beings.
He'd probably have a complex relationship with Sirzechs. As Rias's father, Naruto would be protective of his daughter and might be cautious around Sirzechs at first. But given Naruto's ability to see the good in people, they could end up as allies. With Issei, Naruto might see a bit of himself in the young pervert - turned - hero and could offer him some guidance in terms of power and relationships.
Yes, there could be. Fanfiction often combines different fictional universes in creative ways. It's not uncommon for fans to write stories where characters from one series, like Naruto, have an interest in or are related to characters from another series, such as the Zeoticus Gremory from High School DxD. However, the popularity and availability of such a specific fanfiction might vary depending on the fanfiction platforms and the creativity of the fan writers in that community.
One potential plotline could be Naruto being summoned to the world of Rias by accident. He then has to figure out how to get back home while also getting involved in the power struggles within the devil world. Maybe he becomes a key player in a battle for control of a certain territory.
The plot might involve Naruto being shunned by the Gremory family or their associates. This could lead to Naruto having to find his own path. He could encounter other outcasts or those who also feel neglected. Together, they might form an alliance to change the perception of the Gremory family towards them or to simply make a place for themselves in this world that seems to not want them.
Well, 'The Crossover of Rias Gremory' is a fanfiction that you might like. It combines the world of Rias Gremory with other fantasy elements. In this fanfic, there are some really cool battles and strategic planning. The author does a great job of bringing out the unique abilities of Rias in the crossover scenario. It also explores some new relationships that Rias forms which add depth to the story.