Obviously, Naruto is a common character as it's in the title. Sasuke is also often included. He might be Naruto's rival not just in ninja skills but also in terms of popularity and wealth in the high school setting.
One interesting plot could be a rich Naruto attending a high - end ninja academy in a modern - day high school setting. He might use his wealth to upgrade ninja tools and impress his classmates.
In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.
They could be rivals in a school - wide competition, like a debate tournament. Naruto, with his passionate but sometimes unpolished arguments, and Ino, with her well - rehearsed and sophisticated points, constantly try to outdo each other. But in the end, they both learn from the experience and gain respect for one another.
For Naruto, high school might be a place where he tries to fit in while still holding onto his unique personality. He could be a bit clumsy in social situations but always ready to stand up for what's right. Kushina would be the girl with a fiery spirit. She would be good at academics and sports, but she might have a hidden vulnerability. When she meets Naruto, he helps her to show that side more and they both grow as characters in the high school environment.
One possible fanfiction could be about Naruto characters attending the school in High School DxD. For example, Naruto's positive and determined attitude might clash with the more complex social and power dynamics in the DxD world. He could make new friends or even rivals among the devils, angels, and fallen angels.
One possible fanfiction could be about Naruto characters somehow ending up in the world of High School DxD. Maybe Naruto's skills in combat and his determination would make him a formidable opponent in the battles that often occur in the High School DxD universe. He could form interesting alliances or rivalries with the characters there.
A fanfiction could focus on Naruto's training regime influencing the characters in High School DxD. His intense physical and mental training could inspire the students at the school. They might start incorporating some of his training methods, like running up trees or on water, to improve their own strength. And Naruto could also learn from their magic-based training and combine it with his chakra control for new and powerful techniques.
A fanfiction might explore how the power of the Excalibur in High School DxD would interact with Naruto's chakra. Since the Excalibur is a powerful holy weapon, it could have some interesting reactions when in the presence of Naruto's unique chakra, which is different from the magic in the High School DxD world. For example, it could either enhance or nullify certain abilities depending on how the author writes it.
There could be. Fanfiction writers are known for their wild and creative ideas. Since both Naruto and High School DxD are popular series, someone may have written a fanfic where Naruto is presented as a god - like figure within the High School DxD universe. This could add an interesting twist to the story, perhaps bringing in Naruto's unique powers and abilities into the High School DxD world.