In fanfiction, if Naruto were born with red eyes, it could signify a different lineage. Maybe he'd be related to a more mysterious or powerful clan. His red eyes might give him unique powers, like enhanced visual abilities or a special type of chakra control. It could also change the way others perceive him. Instead of being seen as just an underdog with the Nine - Tails, he might be feared or respected from the start because of his strange - looking eyes.
In a Naruto fanfiction with red eyes, he might gain this trait as a result of a new power-up. For example, he could encounter a powerful sage or a mysterious entity that bestows him with this red - eyed form. His abilities would likely change as well. He could have enhanced perception, like being able to see chakra more clearly or even predict his opponents' moves better. His friends might be initially shocked but would soon accept this new Naruto as he uses his powers for the good of the village.
He might be more confident. In the original, Naruto was often looked down upon. But with red eyes, which could be seen as a sign of power, he may grow up with a different self - image. He might not have to work as hard to prove himself initially, as his eyes would already mark him as special.
Sasuke is another character who might be involved as a main character in such fanfictions. If the red - eyes concept is related to the Sharingan or some new form of eye power, Sasuke's connection to the Uchiha and their eye powers makes him a likely candidate to be part of the story. The red - eyed character might be his ally or rival.
In some 'Naruto Red Eyes Fanfiction', the red eyes might be a sign of a curse. A character with red eyes has to deal with the negative aspects of this curse, like being ostracized by the village. However, they strive to overcome this and prove their worth, perhaps by using the power of their red eyes in a positive way to protect the village.
The plot could involve Naruto's red eyes being the key to an ancient prophecy. People from other villages might try to capture him to use his eyes for their own gain. Naruto, along with his friends, would have to go on the run and protect himself while also trying to figure out the true meaning behind his red eyes.
One possibility is that it gives him a more mysterious and alluring look. In fanfiction, authors often use physical changes to symbolize a character's inner transformation or special powers. Black hair and red eyes might signify a new, more powerful Naruto, perhaps with a connection to some ancient or dark power source.
The main character of the book,"The Second Generation of the Wood Leaf," was a transmigrator. He became the experimental subject of the Thousand Hand Pillars and the Uchiha Spot. He had a Shura Eye and a White Eye. He was Sasuke's cousin. I hope you like my recommendation. Muah ~
A fanfiction where Naruto's black hair and red eyes are a sign of a new form he has unlocked. This form could have unique powers, like the ability to control shadows or read minds. He then has to learn how to master this form while dealing with the reactions of his friends and foes in the ninja world.
Sasuke is also frequently a main character in these fanfics. Imagine if Sasuke had red eyes instead of his Sharingan. It could completely change his character arc. He might be even more of an outcast or have a different set of powers that make him both feared and respected. And then there are the Akatsuki members. Some fanfics might make one of them have red eyes and explore how that changes their role within the organization and in the overall Naruto story.