Obviously Naruto himself as the main character. Since he is the son of Ophis in this fanfiction, Ophis would also be an important character, either directly involved in Naruto's life or being a sort of shadowy influence. His friends like Sasuke and Sakura would still likely be major characters as they interact with Naruto in this new situation. Kakashi could also be there, guiding Naruto as he did in the original series but now having to deal with Naruto's new identity and the potential challenges it brings.
The main characters would be Naruto for sure. Then, there could be new characters introduced who are related to Ophis in some way. Maybe some of Ophis's followers or enemies who now have an interest in Naruto. The Hokage at the time, whether it's Tsunade or someone else, would also be an important character as they would have to manage Naruto's situation within the village. And of course, Naruto's team - mates and other ninja friends like Shikamaru and Ino would still be part of the story, just with a new dynamic due to Naruto's changed heritage.
Naruto is the central character without a doubt. Alongside him, Ophis would play a crucial role, even if it's more of a mysterious one. Characters from the Akatsuki might also become more involved as Naruto's relation to Ophis could draw their attention. They might see him as a threat or an opportunity. His family members in the village, like Iruka who has always been like a brother to Naruto, would be important too. They would have to adjust to Naruto's new status as the son of Ophis and support him through the changes he experiences.
Obviously Naruto and Ophis. Naruto is the main protagonist from the Naruto series, and Ophis is from another fictional context. There could also be some of Naruto's friends like Sasuke or Sakura who might be involved in some way. Maybe they are worried about Naruto when he disappears into Ophis' world.
Obviously, Harry Potter would be one of the main characters. He's the central figure in the original series. And Ophis, as the other part of the fanfiction's title, would also be a main character. Her unique abilities and personality would play a big role. Hermione and Ron could also be important as they are Harry's closest friends and would be involved in any new adventures that come about due to Ophis's presence.
Obviously, Naruto and Lucy would be the main characters. Naruto as the son of Lucy would be at the center of the story. There might also be other Naruto -verse characters like Sasuke, Sakura, and Kakashi. They would interact with Naruto in the context of his new identity as Lucy's son.
Obviously Naruto would be the main character since it's about him being the son of Ra. There might also be characters like Sasuke, as he's Naruto's long - time friend and rival. Kakashi could also be in it, perhaps guiding Naruto through his new journey related to his identity as Ra's son.
Obviously, Naruto would be the main character. Since he's the son of Azula in this fanfiction, Azula herself would also be a very important character, even if she might not be present all the time. And characters like Sasuke and Sakura would still be around, as they are Naruto's friends and comrades in the Naruto universe.
Arceus itself might be a character in a way. Maybe it appears in Naruto's dreams or visions, guiding him on how to use his powers. Also, other characters from the Naruto universe like Sakura, who might be in awe of Naruto's new abilities, and might also play a role in helping him understand and control his powers better.
Obviously Naruto would be one of the main characters. Since it's about him being the son of Seras, Seras herself would be an important character too, even if she might not be present in the story directly but her influence on Naruto would be significant.
Obviously Naruto, as the title implies he is the main focus. And since he is the son of Alucard, Alucard himself might be a major character, either in flashbacks or as a guiding force in Naruto's life.
Obviously, Naruto would be one of the main characters. And since it's about him being the son of Deathstroke, Deathstroke himself would be important. Also, characters from the Naruto universe like Sasuke and Sakura might still play significant roles as they interact with this new Naruto who has a different background.
Obviously Naruto would be one of the main characters. And since it's about him being the son of Renamon, Renamon would also be a crucial character, either in person or through Naruto's memories or inherited traits.