Redemption and sacrifice. Some fanfics use the eternal mangekyou sharingan as a tool to tell stories about characters who seek redemption or are willing to make sacrifices for the greater good, given the great power and responsibility that comes with the sharingan.
Power. The eternal mangekyou sharingan represents a great power in the Naruto world, so many fanfics focus on how characters use or struggle with this power.
The Eternal Mangekyou Sharingan is a very powerful and significant element in Naruto fanfiction. It represents a high - level evolution of the Sharingan. In fanfictions, it often gives the characters who possess it extraordinary abilities, like enhanced visual powers, the ability to use unique and powerful jutsus.
In Naruto fanfiction, it's often portrayed as extremely powerful. It can give characters abilities like seeing through any illusion, predicting an opponent's moves with near - perfect accuracy.
Another possibility is an ancient evil that has been awakened by the presence of Naruto's new power. The Eternal Mangekyou Sharingan might emit some sort of energy that disturbs an old seal or something. This ancient evil could be a powerful demon or a long - forgotten ninja with dark powers. It would be a huge threat not only to Naruto but also to the entire ninja world, and Naruto would have to use his new - found power along with his usual determination to stop it.
In the fanfic, Naruto having the Eternal Mangekyou Sharingan could lead to a change in his relationships. His friends might be both in awe and a bit worried about this new power he has. Sasuke, being an Uchiha, could have a complex reaction. Maybe they would train together to better understand and control this power. Naruto could also use it to try and bridge the gap between the Uchiha and the rest of the village even more, as he now has a part of the Uchiha heritage in a very powerful way.
One possible plot could be that Naruto gains the Eternal Mangekyou Sharingan through some sort of unexpected and mysterious event. Maybe it's a result of a powerful jutsu gone wrong that fuses his own chakra system with that of a Sharingan - user. This new power could initially be difficult for Naruto to control, leading to him having to isolate himself to figure it out. As he masters it, he could use it in unique ways, like combining the Sharingan's abilities with his own Rasengan techniques, creating entirely new and powerful attacks.
The plot could involve some sort of time - travel or alternate dimension scenario. Naruto could be sent to a parallel world where the Uchiha clan was never massacred. There, he befriends the Uchiha and learns their ways. Eventually, he earns the right to receive the Eternal Mangekyou Sharingan through his deeds and his strong bond with the clan. With this new power, he has to find a way to return to his own world and use it to protect his friends and village from a new, greater threat.
One popular 'naruto eternal mangekyou sharingan fanfic' is 'The Power of the Eternal Mangekyou'. It delves deep into the abilities and the backstories related to the eternal mangekyou sharingan in the Naruto universe. The characters are well - developed, and it shows how the power of this special dojutsu can change the course of battles and relationships.
In this fanfiction, Naruto getting the eternal mangekyou sharingan might lead to him exploring his family's past more deeply. Since the sharingan has ties to the Uchiha clan, Naruto could discover some long - lost secrets about his own family's connection to the Uchiha. This could open up a whole new plotline where he uncovers hidden villages or techniques related to his family's history.
Another common theme is redemption. Sometimes, a character with the eternal mangekyou has made mistakes in the past. Fanfictions might use this power as a means for the character to atone for their sins and become a better person within the Naruto universe. It could be through using their power to protect the innocent or make up for past wrongs.
His relationships would also change. Some of his friends might be a bit wary of him now that he has such a powerful and somewhat feared ability. Naruto would have to work hard to show them that he's still the same Naruto. At the same time, he could form new alliances with those who are interested in his new power or who can help him understand it better. He might also be more isolated at times as he delves deeper into mastering the Sharingan, which would be a big change from his usually outgoing and social self.