In a fanfiction, an OC Uchiha born with an activated Sharingan could face unique challenges. The Sharingan drains chakra, and being born with it activated might mean they have to learn early on how to manage their chakra levels more effectively. Also, they could attract unwanted attention, either from jealous clan members or from enemies who see them as a threat due to their special ability.
The backstory of this OC Uchiha could be really interesting. Maybe there was some sort of special event during the pregnancy that caused the Sharingan to be activated at birth. Their parents might have been both extremely powerful Uchiha with unique genetic traits. This OC could grow up with a sense of superiority because of the Sharingan, but also a sense of isolation as they are different from their peers. They could use their Sharingan in creative ways, like developing new jutsu based on its abilities that no other Uchiha has thought of before.
In terms of the overarching Naruto plot, they could have a major impact on the Akatsuki's plans. If the Akatsuki hears about an OC Uchiha with an activated Sharingan from birth, they might try to recruit them. This would put the OC in a difficult position, as they would have to decide whether to side with the Akatsuki or stay loyal to their clan and village. Their decision could change the course of many events in the Naruto world.
First, give your OC a unique backstory. For an Uchiha OC, you could explore their family's past, like if they were part of a secret Uchiha faction. Second, design their abilities carefully. Maybe they have a sharingan ability that's different from the norm, such as seeing through illusions of any kind. Third, develop their personality. An OC could be a bit of a rebel within the Uchiha clan, not agreeing with all of their traditional ways. This makes them more interesting when interacting with Naruto, who also has his own set of values.
One great fem Naruto with Uchiha Sharingan fanfiction is 'The New Path of a Female Naruto'. It explores how a female Naruto, who somehow obtains the Sharingan, changes the Naruto universe. The story has really interesting character developments and unique plot twists.
One possible concept could be a story where a character from Fairy Tail somehow obtains the Sharingan from the Naruto universe. This could lead to all kinds of new abilities and storylines. For example, they might use the Sharingan's predictive abilities in battles within the Fairy Tail world, creating a whole new dynamic in combat.
Well, if Naruto were Madara's brother in a fanfiction, it would completely change the Naruto universe. Their power levels combined could make them an unbeatable force. Naruto's positive attitude might have influenced Madara to not go down the dark path he did in the original story. It could also lead to different alliances and battles, with Naruto perhaps trying to reason with Madara and change his view of the ninja world.
Well, if Naruto was born with the Sharingan in fanfiction, it would be a game - changer. Firstly, his training with Iruka and later Kakashi would be different. Instead of focusing on his own natural chakra and the Rasengan, he could also be trained to master the abilities of the Sharingan. This could potentially make him a much more powerful ninja at a younger age. And in battles, he could use the Sharingan's predictive abilities to dodge attacks more effectively and counter - attack with greater precision.
Well, one possibility is that he'd have the Sharingan from the start. He might grow up with different training methods, more focused on Uchiha techniques. Maybe he'd be more of an outcast in the village not just because of the Nine - Tails, but also because of the Uchiha's reputation. And his relationship with Sasuke would be completely different, perhaps they'd be rivals in a whole new way, competing over who is the true Uchiha heir in terms of power and abilities.
First, give the OC a strong backstory related to the Uchiha clan's history. Maybe they were a survivor of the massacre or had a family member who was wronged. Second, develop their unique abilities. It could be a special form of the Sharingan or a new jutsu. Third, define their personality. A brooding and determined personality would fit well, as they are on a revenge quest.
The uniqueness. It combines two very distinct elements. Naruto is already a beloved character, and making the character female adds a new dimension. Then adding the Uchiha Sharingan, which is such a powerful and iconic ability in the Naruto universe, makes for a really interesting combination that fans love to explore.
First, focus on their initial reaction to being reborn as an Uchiha. Are they excited, scared, or confused? This will set the tone for their character development. For example, if they are excited, they might be more eager to explore their new powers and the Uchiha heritage right away.