In many fanfictions, the scenario of Naruto and Itachi killing the Uchiha clan is a very interesting but also controversial topic. One aspect could be the change in Naruto's character. Usually, Naruto stands for justice and protecting others. If he were involved in such a massacre, it would be a huge deviation from his original character. Maybe in the fanfiction, there could be some extreme situations that force him to do so, like being mind - controlled or having some false information.
In some fanfictions, a possible motivation for Naruto could be to prevent a greater evil. Maybe he was tricked into believing that the Uchiha clan was about to start a war that would destroy the entire ninja world. So, he thought that by taking part in killing the clan, he could save more lives in the long run.
In the manga, Itachi Uchiha typically has a combination of dark colors like black for his clothing and his eyes are often shown as intense and dark. His hair is usually black as well, adding to his mysterious look.
One idea could be a story where Itachi and Kushina meet in a parallel universe. In this universe, the events of the original Naruto storyline are altered, and they end up on the same side, fighting against a new common enemy. Their unique abilities, Itachi's Sharingan and Kushina's powerful chakra, would make for an interesting combination in battles.
Let's imagine Itachi Uchiha in love with a fellow Uchiha. They grew up together, trained together. Their love was based on a deep understanding of each other's pain and power. But when the Uchiha clan's fate was at stake, Itachi had to make difficult choices. His love for her was strong, but his loyalty to the village made him do things that seemed to shatter their relationship. In the end, his love remained in his heart, a hidden and painful memory.
In many fanfics, Naruto might save the Uchiha clan by preventing the massacre. He could use his influence and friendship to change Itachi's mind. For example, if Naruto had known about the threat to the Uchiha clan earlier, he might have been able to talk to the village elders and find a peaceful solution. He could also have protected the Uchiha clan from outside threats that might have led to their downfall.
If Naruto saved the Uchiha clan, the story of the Hidden Leaf Village would be rewritten. The history of the Uchiha's massacre would no longer be a dark stain on the village's past. The Uchiha would contribute their unique skills and abilities to the village's development. For example, their Sharingan abilities could be used for better security or in battles against common enemies. There would also be a change in the relationships between characters. People who were once enemies of the Uchiha might have to learn to work with them.
First, you need to develop your OC well. Give them a unique backstory, personality, and goals. For example, if your OC is a ninja, what are their special abilities? Then, think about how they interact with the existing characters. With Orochimaru, it could be a relationship of fear or mentorship. With Itachi, perhaps respect or a family - like bond. For Naruto, it could be friendship. Also, have a clear plot. Maybe the OC is caught in the middle of a power struggle between Orochimaru and those who oppose him, and Itachi and Naruto are on different sides of this struggle.
Well, he could be a foreign exchange student of sorts from a hidden land of ninjas. His skills would make him stand out immediately. He might befriend Harry and help him train in a different way of combat, using his Sharingan to analyze the weaknesses of their enemies like Death Eaters.
They could overcome differences through mutual respect. Itachi has his own set of values based on his upbringing in the Uchiha clan. The reader may have different values coming from a non - ninja background. But if they respect each other's views, they can find common ground. For example, they both might value loyalty, just in different ways. By recognizing and respecting this, they can build a stronger relationship.