It could also be a new character introduced specifically for the fanfic. Maybe an orphan from a small village who discovers they have the evil eye and then gets drawn into the larger Naruto world, facing challenges and making a name for themselves while dealing with their unique power.
Naruto himself could also be the main character with an evil eye. It would create a huge contrast to his usual positive and determined self. He would have to struggle with the dark influence of the evil eye while still trying to uphold his values of friendship and protecting the village.
Sasuke could also become an antagonist in this scenario. If Naruto turns evil, Sasuke, who has his own sense of justice, would likely oppose Naruto. Their once - strong friendship would be shattered, and they would end up fighting each other, with Sasuke trying to stop Naruto from causing more destruction.
A new character could be created as the main character. This character could be an orphan who discovers they have a single Sharingan eye, and they don't know where it came from. They then embark on a journey to find out about their heritage and the origin of their eye. Along the way, they meet various Naruto characters and learn about the power and responsibility that comes with the Sharingan. They might face challenges from both those who want to steal their eye and those who fear its power.
In the 'naruto eye of the elders fanfic', the main characters could vary widely. It might be a young and inexperienced ninja who is chosen to inherit the knowledge of the eye of the elders. This character would then have to grow and develop in order to handle the power and responsibility that comes with it. Another possibility is that an older, wiser character who has known about the eye for a long time could be a main character. They could act as a mentor to the younger characters, guiding them in the ways of the eye. And of course, there could be antagonists who oppose the main characters' goals regarding the eye, such as power - hungry ninja from other clans who see the eye as a means to dominate the ninja world.
Sasuke Uchiha could be a great choice as the main character. He already has a complex backstory and a lot of room for character development. His journey from seeking revenge to finding his own path in the Naruto series can be further explored in a fanfic.
It could be an original character. Maybe a young ninja who discovers their forging abilities by accident. They might come from a small, unassuming clan that has kept the forging secrets hidden for generations. This character would then have to navigate the Naruto world while keeping their newfound power a secret at first, until they realize they can use it to make a difference.
Perhaps Sasuke could be the main character in a different take on a 'hitman naruto fanfic'. He already has his own vendetta and his skills as a ninja could easily be translated into those of a hitman. He has the Sharingan, which gives him an advantage in combat and tracking, making him a formidable assassin - like figure.
It could be a new character that you create specifically for the fanfic. This character could be an outcast from their village because of their strange Koton abilities. They then have to prove themselves and their powers to the others.
Sasuke could also be a main character in such a fanfic. Given his quest for power and his complex personality, his encounter with the Shinigami could lead to some really interesting character development. He might be tempted by the Shinigami's power or be forced to make difficult choices that would change his path.
Rock Lee could be an excellent main character for such a fanfic. Since he already focuses on physical combat in the form of taijutsu, wushu would be a natural extension for him. He could be sent on a journey to learn the true essence of wushu and bring that knowledge back to Konoha to revolutionize the way they think about physical combat.
Sasuke could be a great main character for a swordsman - themed fanfic. Since he already uses a sword - like weapon, the story could focus on his further development as a swordsman, exploring different sword techniques and their origins.