In this fanfic, Naruto could bring his sense of justice to Sona's side. Since Naruto is always about protecting his friends and doing what's right, he could inspire Sona and her followers. His chakra could be an interesting element in the world of devils and angels. He might even find a way to use his chakra to enhance the abilities of Sona's peerage members.
The plot could start with Naruto somehow being transported to the Highschool DxD universe. He meets Sona and is intrigued by her goals. He decides to join her because he sees similarities between her leadership style and what he values. As he becomes part of her group, he has to learn about the rules of this new world. His presence might also cause some rivalries among other groups who are either jealous or see him as a threat.
One possible plot could be Naruto's initial confusion upon entering the Sona Peerage. He'd be used to his own world in Naruto, with its unique powers and politics. In the Sona Peerage, he'd have to learn about the different ranking systems and how to work within that hierarchy. His ninja skills could give him an edge in combat situations within the peerage, but he'd also have to adapt to new forms of magic. Maybe he'd form an unlikely bond with one of Sona's more reserved members and together they'd face a common enemy threatening the peerage.
The plot could also involve Naruto being mistaken for a new type of devil or a strange being in the Highschool DxD world. His chakra could be seen as a very unique power source. He might have to go to the high school in the DxD world and get into all kinds of adventures, like dealing with the pervy situations that Issei often finds himself in, but with his own Naruto - style humor and strength.
At first, Naruto might be a bit confused by Sona's world, but his natural curiosity would drive him to learn more. He would ask her a lot of questions, and Sona would find his naivete endearing yet also frustrating at times. As they spend more time together, Naruto would start to understand Sona's motives better and would do his best to support her. He might even start to develop a special bond with her, like a really good friendship or something more, depending on how the fanfic develops.
Power - up themes are also common. Naruto already has his powerful ninja abilities, and when combined with the magic and power systems in High School DxD, there are often scenarios where he or Sona gain new powers or find new ways to use their existing ones. For example, Naruto might learn to combine his chakra with Sona's magic for a super - attack. Another theme is friendship and alliance. Since they are from different worlds, they need to form an alliance to face common enemies. This often leads to the development of a deep friendship between them as they rely on each other's strengths.
A third plot idea might be Sona trying to modernize the traditions of the devil world within the context of the school. She could face opposition from more conservative devils, and the story could explore her struggle to bring about change while still maintaining her position and respect.
One possibility could be that Sona's brother is a powerful figure in the underworld. He might be involved in political intrigue within the devil society. For example, he could be trying to form alliances with other noble devil families to increase the power and influence of Sona's family. Maybe he has some special abilities that are yet to be discovered by others, which he uses to his advantage in the complex power dynamics of the Highschool DxD world.
Well, it could be about Naruto and Sona's brother having adventures together. Maybe they team up to face a common enemy in the ninja world. They could learn from each other's skills and abilities.
One possible fanfiction could be about Rias and Sona teaming up for a school event. They might put aside their usual competitiveness and work together to organize a devil - related festival at the school. They could combine their unique skills and powers to create an amazing event that not only impresses the other students but also strengthens their bond as friends.
In a fanfiction where Naruto goes to Highschool DxD, he could introduce new concepts of chakra to the world. This would be really fascinating as the characters in DxD might try to incorporate it into their own powers. Naruto could also be a bit of a fish out of water, not fully understanding the social norms and hierarchies in Highschool DxD at first. But his kind heart would help him navigate through it all, and he'd end up changing the school environment in a positive way with his unique personality.
A possible scenario is that Ravel teams up with Naruto to fight a common enemy. Ravel's magical abilities and Naruto's ninjutsu would make for an interesting combination. They could learn from each other's fighting styles during their battles, and their friendship could grow as they face challenges together.