It could have completely changed the dynamics of his battles and his relationships with others. The Sharingan would have given him an extra edge and new abilities.
If Naruto had the Sharingan in fanfic, he'd likely become even more powerful. His combat skills would improve as he could use the Sharingan to predict his opponents' moves more accurately. He might also be able to use some of the unique jutsus associated with the Sharingan. For example, he could potentially learn to use Amaterasu if the fanfic writer allows for that kind of power combination.
In a fanfic, Naruto with the Rinnegan and Sharingan would have a whole new set of challenges. He would have to deal with the jealousy and fear of other ninja villages. His own village might also be divided on how to handle his new powers. On the positive side, he could use these eyes to better understand the history of the ninja world. For example, the Rinnegan might give him insights into the Sage of Six Paths' true intentions, and the Sharingan could help him uncover secrets about his own family. He would also have to train hard to fully utilize the combined potential of these two powerful eyes, which could lead to some interesting training arcs in the fanfic.
Well, he'd probably be extremely powerful. The Sharingan already gives some great abilities like enhanced perception and the ability to copy jutsu. If Naruto had a blue Sharingan, he might be able to combine those with his own massive chakra reserves. Maybe he could use the Sharingan to better understand and counter his opponents' moves while using his Rasengan or other jutsu more effectively.
In fanfiction, if Luffy and Nami had a baby, it would be an interesting combination. The baby might inherit Luffy's carefree and determined nature. Luffy's rubber abilities are a result of the Devil Fruit, and it's not clear if they could be passed on, but if so, the baby could have some unique physical traits. Nami is highly intelligent and good with navigation and finances. The baby could potentially grow up to be a great navigator like Nami while also having Luffy's adventurous spirit, making them a formidable presence in the One Piece world.
The theme of acceptance is quite common. Fem Luffy often has to be accepted by the other characters in the story. This could be because she's different due to her gender or her slightly different personality traits. Also, the theme of self - discovery is prevalent. As fem Luffy navigates the pirate world, she discovers more about herself, her abilities, and her place in the grand scheme of things.
The presence of the Sharingan could also change the character's relationships. Other characters might be in awe of this new power, or they could be suspicious and fear it. The character with the Sharingan would have to deal with these new attitudes. They might be seen as an outcast or a powerful ally depending on how they use their power. It could also attract the attention of the gods or more powerful beings in the Percy Jackson universe, who might want to either control or destroy this new and unknown power.
Naruto would probably become more of an outcast in some ways. Since the Sharingan is an Uchiha - specific power, having it as a non - Uchiha like Naruto would make others suspicious. This could make him more distrustful of others and more reliant on his own new powers. He might also become more strategic in his battles, using the Sharingan's abilities to analyze his opponents better.
I recommend "From the beginning of Koba to God." After the protagonist, Uchiha Kirikyo, transmigrated, he became one of the twin stars of Koba. He had a placement system and inherited his father's will, practicing the eternal kaleidoscope. I hope you like this fairy's recommendation. Muah ~😗
If Naruto had the Sharingan in fanfiction, it would likely lead to some interesting power - up scenarios. He could combine the power of the Sharingan with his own massive chakra reserves. This might make him an even more formidable opponent. His training would also take a new turn as he'd have to learn to control and master the Sharingan's abilities, like the different levels of the Sharingan and their unique powers.