One common theme is power growth. Since the Gremory family is known for their power in the highschool dxd universe, many fanfictions focus on characters within the family getting stronger. Another theme is loyalty, as the Gremorys have a strong sense of loyalty to each other and their allies.
The fanfic genre in general gives authors the freedom to play with the rules. In 'naruto gremory fanfic', they can create new power - ups for Naruto, new plotlines involving the Gremory family's politics, and new ways for the two worlds to collide. This freedom often leads to very creative and engaging stories that draw in readers who are looking for something different from the original source materials.
In this fanfiction, the plot could also center around Naruto trying to understand the Gremory family's history and secrets. As he delves deeper, he discovers things that could change the future of the family. He might also have to deal with enemies from both the Naruto universe and the Gremory universe who are out to stop him from becoming a successful heir. He would need to use his quick thinking and combat skills to protect himself and the family.
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.
It could be that some of the neglected characters from Naruto, like Rock Lee for instance, are made main characters in this fanfiction and are paired with a Gremory character. Maybe a Gremory character who also has been somewhat overlooked in their own series. This would give a new perspective and new storylines to explore.
Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.