One common theme is the power struggle. Since both Naruto and DxD have complex power systems, in the fanfiction, Naruto often has to prove himself in the DxD world which has its own set of powerful beings. Another theme is friendship. Naruto is known for his ability to make friends, and in these crossovers, he forms new friendships in the DxD world.
One possible aspect to consider in a Naruto and Highschool DxD harem fanfiction is the character interactions. For example, how Naruto's positive and determined personality might mesh with the various characters from Highschool DxD. His ninja skills could also add an interesting dynamic to the story. Maybe he could teach some of the characters self - defense or strategic thinking. Additionally, the harem element could involve Naruto forming close relationships with multiple characters from both universes, but in a non - sleazy way, perhaps based on mutual respect and shared adventures.
One popular plotline could be Naruto being transferred to the Highschool DxD world and his ninja skills making him stand out among the devils and angels. This leads to various characters being attracted to him, forming the harem. Another could be Naruto having to use his chakra to solve the power struggles in the DxD world while also dealing with his newfound romantic interests.
Another good one could be 'Naruto and the DxD Harem Adventure'. It starts with Naruto finding himself in a strange situation in the DxD world. As the story progresses, he starts to gain allies and also the affection of multiple female characters. The fanfiction does a good job of blending the different mythologies and power systems from both Naruto and DxD.
One thing that makes this type of fanfiction appealing is the contrast. Naruto, a character known for his loyalty, is betrayed in his own world. Then he's thrown into the DxD highschool where there's a whole new set of rules and relationships. The harem part means there are multiple characters with different personalities that can have various interactions with Naruto. It's also about seeing Naruto grow and change in this new environment, perhaps learning to trust again through his relationships with the harem members.
Well, you can expect some really interesting character crossovers. Naruto's unique ninja abilities and his never - give - up attitude will surely make an impact. In a harem situation, he'll probably be surrounded by characters from Highschool DxD who are intrigued by his different ways. There could be a lot of cultural clashes too, since the Naruto world and Highschool DxD world have different norms.
Naruto and Ravel might start off as strangers. Naruto would be the curious outsider, and Ravel would be intrigued by his different appearance and powers. Then, Naruto could interact with other DxD characters. For example, he might have some friendly competitions with Issei. As the harem forms, Naruto would have to balance his relationships with different girls. He might have deep conversations with Ravel about their different worlds and values.
The story could unfold in an interesting way. Naruto's ninja skills would be quite a novelty in the Highschool DxD world. Ravel, being a devil, would initially be curious about Naruto. The harem aspect would come into play as Naruto's kind heart and heroic deeds draw in more female characters. They would have to navigate the complex social and power structures of the DxD world. Naruto might teach them some of his ninja philosophies, and together they would create a unique dynamic within the group, facing challenges both from the devils' internal politics and external threats.
The combination of two very different universes is appealing. Naruto's world of ninjas with its complex jutsu and clans, and Highschool DxD's world of devils, angels, and fallen angels. The harem aspect adds another layer of interest as it involves relationships. For example, seeing how Naruto characters would react to the more flirty and romantic nature of DxD characters can be really engaging.
One popular Naruto and Highschool DxD harem fanfiction is 'The Shinobi of Kuoh Academy'. It combines the ninja elements from Naruto with the supernatural setting of Highschool DxD in an interesting way. The main character, often a transfer student with Naruto - like abilities, navigates through the complex social and supernatural hierarchies while building his own harem.