One popular theme is the power struggle. In Highschool DxD, power is a crucial element. Stray devils often face challenges related to power, whether it's trying to gain more power to survive in the dangerous supernatural world or dealing with those who have more power. Another theme is redemption. Some stray devil characters may try to atone for their past misdeeds. They might have made bad choices in the past, but in the fanfiction, they could be on a path to redemption, perhaps by helping the main characters or the good side of the supernatural world.
One possible scenario in this fanfiction could be Naruto having his unique ninja skills in the Highschool DxD world. His godlike abilities might make him stand out among the devils and other supernatural beings. He could use his shadow clone jutsu for various strategic purposes, like infiltrating devil strongholds or getting out of tricky situations during the school's chaotic events.
There could well be. Fanfiction writers often like to explore crossovers and unique concepts. However, not all fanfic writers might be interested in combining Naruto with 'Highschool DxD' in a certain way, so there are likely to be some that fit the 'Naruto not a devil highschool dxd fanfiction' idea. You might have to dig a bit through different fanfic archives to locate them.
One possible story could be that Naruto is somehow transported to the world of High School DxD. He might initially be confused by the presence of devils and the different power systems. His ninja skills could give him an edge, and he could form an unlikely alliance with some of the characters from High School DxD, like Issei. They could team up to face a new threat, perhaps a powerful stray devil that is causing chaos in both their worlds combined.
One characteristic could be that the story remains true to the Naruto universe's tone and themes. It would likely have Naruto dealing with his own set of challenges like fighting against the Akatsuki or protecting his village. It wouldn't introduce the harem - like or devil - based elements from 'Highschool DxD'. Also, the characters would be from the Naruto world, with their own personalities and abilities intact, without any 'Highschool DxD' - influenced changes.
Well, the plot could center around Naruto being a godlike figure who decides to attend the high school in the DxD world to understand the devils better. He ends up getting involved in a conflict between different devil factions. His Naruto - like determination and his unique powers, which are a blend of his original ninja powers and new devil - like abilities, help him to resolve the conflict and bring peace to the school. He might also make some good friends among the devils and other supernatural beings, which changes his perspective on them.
First, you need to know the characters well from all three universes. Naruto is a determined ninja with a big heart, Dante is a cool and cocky devil hunter, and the characters in Highschool DxD have their own unique supernatural abilities. Then, think of a good plot. It could be a simple story like they all team up to fight a powerful enemy that threatens all their worlds. Or it could be more complex, like a mystery that involves the different power systems of each universe.
Naruto could fit in as a powerful outsider. His physical abilities and combat skills would be highly regarded. For example, his speed and strength from his ninja training could rival some of the stronger devils in High School DxD. He would also bring his own sense of justice, which might be different from the devils' motives. This could lead to some interesting conflicts and resolutions.
He would fit in as a unique and powerful character. His abilities would make him a force to be reckoned with. He could use his speed and strength to compete with the devils and other supernatural beings in the DxD world.
A Super Devil Naruto in Highschool DxD fanfiction would likely have a lot of action and adventure. Naruto could learn about the different powers in the DxD world like sacred gears and demonic powers. He might even try to combine his ninja powers with these new powers. His relationships with the characters in Highschool DxD would also be a major part of the story. He could befriend some, and be at odds with others depending on their values and goals.