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.
The villagers themselves could be the main antagonists. Since Naruto has been neglected, their continued mistrust and hostility towards him could drive his 'evil' turn. They represent the status quo that has failed Naruto, and he might see them as the source of his problems.
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.
Obviously, the evil Naruto himself would be the main antagonist. He's the one causing trouble in the Teen Titans' world, so he takes on that role.
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.
Well, one interesting concept could be the unique powers the 'evil eye' might bestow. It could potentially give the character abilities like enhanced perception or the power to manipulate certain elements in a way not seen in the original Naruto series. Maybe it allows the user to see through illusions more easily or even create their own powerful illusions.
The main antagonists could be the original Naruto's friends and allies. Since this is an evil Naruto, people like Sasuke, Sakura, and Kakashi would likely oppose him and try to stop him from whatever evil plans he has in the past.
Naruto himself could be the main character in a Shinju fanfic. He has always been about finding new ways to bring peace and understanding. His connection to the nine - tails could play an interesting role if he were to interact with the Shinju. Maybe he could try to convince the Shinju that the ninja world has changed and it doesn't need to be a source of fear and destruction.
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.