The stray devil could be a plot device to bring out new character developments. For example, in Naruto's world, the characters are used to dealing with their own types of threats like the Akatsuki. But a stray devil has different powers and motives. Similarly, in Highschool DxD, the devils, angels, and fallen angels have their own power dynamics. The stray devil's appearance could force characters from both sides to re - evaluate their alliances and strategies.
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.
It could also be a catalyst for change. For instance, in Naruto, it could introduce new forms of magic or powers that the ninja world has never seen before. This could lead to some ninja starting to learn and adapt to these new powers. In Highschool DxD, it might expose weaknesses in the current power structures among the devils, angels, and fallen angels, leading to a reshuffling of power dynamics.
First, know the lore of Highschool DxD well. This includes understanding the different types of devils, their powers, and the hierarchy in the devil world. For stray devils specifically, study their characteristics and how they are different from regular devils. Second, create interesting characters. Make your stray devil character have a unique backstory, personality, and motivation. It could be something like they were cast out from the devil community for a specific reason and now they are trying to find their place. Third, have a good plot. Maybe start with a problem that the stray devil faces, like being hunted by other devils or having to solve a mystery related to their past.
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.
When writing a High School DxD Stray Devil fanfiction, it's important to stay true to the tone of the original series. It's action - packed and has a lot of supernatural elements. For the stray devil part, you could explore how they survive on their own without the support of a devil clan. You can also introduce new characters or bring in existing ones in new ways. For example, a stray devil could form an unlikely alliance with Issei. And don't forget to have a good plot structure with a beginning, middle, and end.
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.
One interesting stray devil fanfiction could be 'The Stray Devil's Redemption'. It delves into the story of a stray devil trying to find its place in the High School DxD world. The author does a great job of exploring the character's internal struggles and how they interact with the main cast in unique ways.