There might be a fanfic where Naruto is reincarnated as a weak devil in the DxD world. In such a story, he has to use his ninja skills and knowledge to survive in a world full of powerful devils and other supernatural beings. The story could explore how his chakra system works in a world dominated by magic, and how he overcomes the prejudice against his weak - devil status.
The character development can be really engaging. The weak devil, starting from a position of weakness, can grow and change throughout the fanfic. Maybe they start as a bullied character but end up being a strong ally. And Naruto's presence can be a catalyst for this change. Also, the exploration of the DxD world from Naruto's perspective, as he tries to understand the devils and their society, adds depth to the story.
The contrast. When a fanfic features a weak character in the Naruto DxD universe, it creates an interesting dynamic. For example, seeing a character with less power try to survive in a world full of powerful ninjas and devils makes for an exciting read as they have to rely on their wits more than their strength.
There are so many fanfics out there that it's hard to specifically name a 'naruto dxd weak fanfic'. However, when you search for fanfics, look for ones where the main character has some kind of weakness that they have to overcome. In the Naruto and DxD universes, this could be related to their powers not being fully developed, or having a psychological weakness. Read the summaries and reviews of the fanfics to see if they match what you're looking for.
The cultural clash is really interesting too. Naruto comes from a world with a very different culture compared to the DxD world. Adding Devil Fruits into the mix makes it even more complex. For instance, Naruto's values of loyalty and hard work might interact in unexpected ways with the more morally ambiguous elements of the DxD world and the power - hungry nature often associated with Devil Fruit users.
One popular 'Naruto Devil Fruits DxD Fanfic' is 'Naruto in DxD with Devil Fruits'. It combines the unique powers from Naruto's world and the Devil Fruits concept from One Piece into the High School DxD universe in an interesting way.
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.
In a fanfiction where Naruto is in the Highschool DxD universe, Naruto could potentially be one of the strongest devils. His vast chakra reserves and powerful jutsu like the Rasengan and Shadow Clone Technique could give him an edge. He has extensive combat experience and his ability to learn quickly would also help him adapt to the new world of devils, angels, and fallen angels in Highschool DxD.
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.