Obviously, Naruto would be one of the main characters since the story is about him being reborn as a devil. There might also be some original devil characters created specifically for this fanfiction that interact with Naruto. And perhaps some of Naruto's old friends from the original series might also play important roles, like Sasuke or Sakura, even if their relationships with Naruto are now different due to his new form.
In this fanfiction, Naruto is the central character as he is reborn as a devil. There could be powerful devil lords or princes who are main characters as well. They might act as mentors, rivals, or enemies to Naruto. Also, characters like Kakashi could make an appearance. Even though he's from the ninja world, his connection to Naruto might lead to some interesting story arcs in the devil - based story.
Obviously Naruto would be one of the main characters since it's in the title. But there could also be other characters like his friends and foes from the original Naruto series, such as Sasuke and Kakashi. They might play different roles in this fanfiction with Naruto being the strongest devil.
Well, Naruto is likely to be one of the main characters. Since it's a Naruto - related fanfiction, he would probably be involved in the story around the devil sword in some way, either as the wielder or someone trying to prevent its misuse.
Obviously Naruto would be one of the main characters. And then there would be the devil figure, who could be an original character created for this fanfiction or some sort of dark entity from the Naruto universe.
Obviously Naruto is one of the main characters as the title implies. Since it's a 'reborn' story, his new self with all the changes is central to the plot.
Well, aside from Naruto and Issei, there could be other important characters. Rias Gremory, who is a devil princess in DxD, might play a significant role. She could be curious about Naruto and his powers, or she might even see him as a potential ally or threat. Also, characters like Akeno Himejima, Kiba Yuuto, and others from the DxD series could be part of the story and interact with the reborn Naruto in different ways.
Mainly, it's the reborn Naruto taking on the role of Kiba. Akamaru is an essential character as they work together in combat and daily life. Kiba's sensei, like Kurenai, will also be an important figure. She will be training this new 'Kiba' who has Naruto's essence inside. And then there are the other Konoha ninjas. They will interact with the reborn Naruto as Kiba, and their reactions to the different behavior and skills of this 'Kiba' will be a significant part of the story.
Obviously, Harry (reborn as a character in the Naruto world) is a main character. Naruto himself is also a key figure as Harry will interact with him. Sasuke could also be important as he is a central character in the Naruto series and his relationship with Naruto and any new character like Harry will play a role in the story.
Sasuke can also be popular. In some fanfictions, he might team up with devil - Naruto or oppose him. His own dark nature can be enhanced or contrasted in the context of the devilish elements in the story.
Often, Naruto himself might be associated as he is the main character of the original series. Writers may give him the devil bloodline to explore how it changes his character and abilities.
Naruto as the main character with his Devil Saiyan form would be central. Also, Rias Gremory could be a main character. She could be intrigued by Naruto's powers and his different way of thinking, coming from a different world. And perhaps the Devil King himself could also play a significant role, either as an antagonist or an unexpected ally to Naruto in this strange new world of DxD.