In the 'ouroboros naruto fanfic', Naruto is almost surely a main character. He is the protagonist of the original series, after all. Besides him, it could be that a new character is introduced as a main character, someone who has a special connection to the Ouroboros concept. However, characters like Kakashi could also be main characters if the fanfic is set in the early days of Naruto's training and focuses on his mentorship.
Since it's a fanfic, it could be that the main characters are various echidnas. There might be a heroic echidna leading the fight against an opposing group. Maybe there's an echidna with special powers related to the ouroboros. Or it could be that there are echidna elders who are trying to bring peace in the midst of the war and are the central figures in the story.
In other cases, like 'The Ouroboros Enigma', the main character could be a scholar named Sophia. She is highly intelligent and has dedicated her life to studying ancient symbols and mysteries. When the ouroboros enigma surfaces, she uses her knowledge and wits to try and solve it, facing many obstacles along the way, including other scholars who may have different motives regarding the enigma.
One interesting idea could be unique interpretations of character relationships. For example, how the author might re - imagine the bond between Naruto and Sasuke in a way that diverges from the original story. Another could be new jutsu concepts that are introduced, adding a fresh layer to the ninja world in the fanfic.
Obviously, Naruto is the main character. He is the one who becomes this 'god - like' figure in the fanfic. But there are also other important characters like Sasuke. Sasuke might play a role in either supporting Naruto's new power or being in conflict with him because of it.
In certain 'naruto wings fanfic', Kakashi could be a main character. His experience and wisdom would be valuable in guiding the younger characters with their newfound winged powers. He might also have his own secrets related to wings that are revealed in the fanfic. And of course, there could be fan - made original characters who are the main focus, with their own unique wing abilities and backstories that interact with the Naruto universe.
Well, Naruto is surely one of the main characters. Since it's related to Naruto, he'll be at the center of the story, probably with enhanced abilities.
Often, the main character is the merchant. They could be a young entrepreneur trying to make a name for themselves in the Naruto world. Besides, there could be supporting characters such as other merchants who are competitors. And of course, ninja characters like Kakashi or Sakura could be involved too. For example, Kakashi might come to the merchant to buy a new set of kunai, and through this interaction, a deeper relationship or story arc could develop.
Perhaps the main characters would include some of the important ninja leaders. For instance, Tsunade, as the Hokage, would be very involved in any legal matters in the Leaf Village. And Shikamaru, with his high intelligence, could be involved in devising or interpreting laws. He has always been good at strategic thinking which could be applied to legal situations.
Since it's a Naruto fanfic about runaways, it might focus on characters who have a reason to leave their normal lives behind. It could be that Naruto is the main character, as he has often felt like an outsider in his village at times. Or perhaps some of the minor characters from the series who have been overlooked but now have their own story as runaways. There could also be a group of misfit shinobi who band together as runaways, and they might include characters who have different abilities and backgrounds from all over the Naruto world.
Obviously, Naruto is one of the main characters. And usually, the slugs, like Katsuyu, are also main characters. They play important roles in the fanfic, either as Naruto's allies or as sources of new powers or knowledge for him.