His friends' reactions would be quite diverse. Hinata would be concerned for Naruto's well - being, fearing that these new eyes might bring some unknown harm to him. Kiba might be excited, seeing it as a new and cool power - up for Naruto. Lee would probably be inspired, thinking that Naruto has found a new way to become stronger and might start training even harder himself. Overall, they would all have to adjust to this new development and support Naruto as he figures out how to fully utilize Madara's eyes in the fanfiction.
His friends would probably be shocked at first. Sasuke might be a bit conflicted, seeing Naruto with an Uchiha - like power. But they would also realize it could be a great advantage for Naruto and for their team as a whole.
His friends would probably be shocked at first. Sasuke might be a bit jealous since the Sharingan is a Uchiha thing. Sakura would be worried about the implications. Kakashi, having had the Sharingan himself, would be more understanding and might try to help Naruto control the new powers.
Naruto's character would become more complex. He'd have to deal with the power and the history associated with Madara's eyes. This might make him more cautious as he realizes the potential danger of the power he now holds.
In fanfiction, if Naruto gets Madara's eyes, he might gain new and powerful abilities. For example, he could potentially have enhanced visual powers like the Sharingan's precognition in battle. His fighting style would likely change as he adapts to these new eyes. He might also face new challenges as his body adjusts to the foreign power of the Uchiha eyes.
There could be a fanfiction where Naruto gets a vision through Madara's eyes. He sees the past events that led Madara to become the powerful and feared ninja he was. This vision makes Naruto understand Madara on a deeper level. He then tries to find a way to prevent the same kind of tragedies that happened in Madara's life from happening again in the present ninja world. Naruto could use this new - found understanding to bring about peace in a different way than he originally thought.
He might be really surprised. Some fanfictions could show him in situations he never thought of, like different kinds of friendships or battles. He'd probably be curious about how fans see him and his world.
Some of his friends might be a bit more cautious around him. For example, Sasuke might be more on guard, as he has a history with the Uchiha and Madara's power is something he'd be very aware of. But Naruto would still try to keep their friendship intact.
If Naruto had Madara's memories in fanfiction, his relationships would shift in multiple ways. With his friends, he might seem a bit more distant at first as he tries to process Madara's often - solitary and distrustful view of others. However, he'd also be more protective, using Madara's knowledge of the world's dangers. His relationship with the village elders could become more strained. Since Madara had a negative view of Konoha's leadership at times, Naruto might start to question some of their decisions more, based on those memories.
If Naruto had Madara's memories in fanfiction, he might gain a deeper understanding of the Uchiha's past and their grudges. He could use this knowledge to prevent future conflicts related to the Uchiha. For example, he might be able to stop any remaining anti - Uchiha sentiment in the village more effectively.
The story would become much more intense. Naruto would suddenly have access to powers that were previously exclusive to the Uchiha. This would shift the power balance in the ninja world.
Well, he could either find it hilarious or a bit offensive, depending on what the fanfiction is about. If it's a comical take on his story, he might laugh his head off. But if it distorts his relationships or his character in a negative way, he might not be too happy. For example, if someone writes a fanfic where he's a coward, which is completely against his real personality, he would likely be annoyed.