There could be new characters created specifically for this fanfiction. Maybe a fellow prisoner who has some special knowledge or ability that helps Naruto during his imprisonment. Or a mysterious figure who is behind Naruto's false imprisonment, pulling the strings from the shadows.
In this fanfiction, Naruto might endure the false imprisonment with dignity at first. Then, as his godlike abilities start to surface, he could use them to not only free himself but also to reform the prison system if it's corrupt. He could use his power to expose the false accusations and bring justice to those who wronged him.
Naruto might initially be in shock and disbelief. He has always been loyal to the village, so being imprisoned for no real reason would be a huge blow. He would probably start by trying to reason with his captors, explaining that he is innocent. For example, he might say things like 'I've always protected this village, why would I do what you're accusing me of?'
Naruto is definitely a main character. His presence and his god - like abilities are what make this fanfiction unique. Then, there could be characters like Rias Gremory. She's an important figure in the DxD world, and her relationship with Naruto could range from being an ally to a potential love interest. Also, characters like Akeno Himejima could be involved. She might be curious about Naruto's powers and his different way of doing things compared to the DxD characters.
Naruto would likely still be one of the main characters, but with a much darker and more powerful version of himself. Sasuke could also be a main character, perhaps with his own brand of godlike power that rivals Naruto's. And there might be new, original characters created specifically for this fanfiction that have some connection to these dark godlike powers.
Well, obviously Naruto and Korra are going to be main characters. They are the ones named in the title. Naruto with his ninja skills and Korra with her bending abilities.
Naruto is most likely to be a main character. He could have a new look, like wearing a pirate hat and a combination of ninja and pirate clothing. Sakura might be another main character, using her medical ninjutsu skills to heal the crew on their pirate ship. There could also be a pirate captain character who befriends Naruto and they embark on adventures together, exploring uncharted islands and facing off against other pirate crews.
For Naruto himself, it often shows his growth. He might be initially angry and frustrated at being wrongly imprisoned. But as the story progresses, he could become more determined to clear his name and prove his worth. It can also strengthen his bonds with his friends as they try to free him.
Obviously Naruto would be one of the main characters since it's in the title. And probably some of his friends from the Naruto series like Sasuke or Sakura. Since it's combined with DBZ, there might also be characters from DBZ like Goku or Vegeta. They could either be allies or rivals to the godlike Naruto.
One example could be a story where Naruto is framed for a crime he didn't commit by a hidden enemy within the village. This enemy manipulates evidence and convinces the village elders to imprison Naruto. Another could be a scenario where an impostor Naruto causes chaos and the real Naruto is wrongly accused and imprisoned as a result.
Obviously Naruto would be one of the main characters. He would bring his unique skills and personality into the Claymore world. Then, there would likely be some of the well - known Claymore characters like Clare. She has her own complex backstory and strong will, which would make for an interesting interaction with Naruto.