One possible plot twist could be that Naruto gains the Mangekyou Sharingan in a moment of extreme emotional turmoil, like seeing Sasuke in a life - threatening situation. This new power might make him an outcast in Konoha at first, as the Sharingan is a symbol of the Uchiha. Another twist could be that the Mangekyou Sharingan has some unforeseen side effects on Naruto's chakra system, making it difficult for him to control his normal jutsu. It could also lead to a power struggle within the village as some might fear Naruto's new - found power.
For his relationship with Kakashi, it could be complex. Kakashi, having his own experiences with the Sharingan, would be in a unique position to guide Naruto. But at the same time, he might be worried that Naruto's new power could attract unwanted attention. Naruto's bond with the villagers could also be affected. Some might see him as more of an Uchiha than a Uzumaki now, and there could be those who fear his power. His relationship with Jiraiya, if he were still alive in the fanfic, would also change. Jiraiya would need to teach Naruto how to use this power for good and not let it corrupt him.
In such a fanfiction, one possible plot could be that Naruto acquires the Mangekyou Sharingan through some kind of magical or experimental accident. Maybe a powerful enemy uses a jutsu that backfires and transfers the Sharingan to Naruto. Then Naruto has to learn to control its power while also facing the prejudice from those who fear the Sharingan's abilities.
Naruto's character would likely become more complex. He'd have to deal with new powers and the responsibilities that come with them. He might become more introspective as he tries to understand the nature of the Sharingan and how it fits into his ninja beliefs.
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.
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.
In many Naruto fanfictions, Itachi is often depicted as an extremely powerful Mangekyou Sharingan user. His original abilities in the canon, like Amaterasu, are further enhanced in fan works. Sasuke is also a common focus. His Mangekyou Sharingan's powers can vary greatly from one fanfiction to another, sometimes with new and unique jutsu created by the authors. Another character could be Madara. Fanfiction writers love to explore the full potential of his Mangekyou Sharingan, often giving him abilities that were only hinted at in the original series.
Naruto would become more introspective. The power of the eternal mangekyou sharingan often comes with a lot of emotional baggage in the Naruto universe. So Naruto might start to question more about his own identity and his place in the ninja world. He might also become more cautious as he realizes the great power he now holds and the potential for misuse.
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.
Well, in Naruto fanfiction related to the Mangekyou Sharingan, we often see authors take creative liberties. They may introduce new forms of the Mangekyou Sharingan that have different patterns and abilities. These can range from controlling elements in a completely new way to having the ability to teleport or even read minds. It allows for a vast expansion of the Naruto universe within the realm of fan - created stories.