At first, it might be a bit awkward. Naruto, not used to being a parent - like figure, would struggle a bit. But as time passes, they would grow closer. Naruto would become someone Naruko could rely on completely.
In this fanfiction, Naruto would be like a mentor and a father to Naruko. Their relationship would start with Naruto being very protective. As Naruko gets older and more skilled, she might start to challenge Naruto's ideas, but still respect him deeply. It would be a relationship full of love, respect and the occasional argument as Naruko tries to find her own identity as a ninja.
In the fanfiction, Naruto and Naruko could start off as strangers who are brought together by the mystery of their Uzumaki bloodline. They might be curious about each other's abilities and start to train together. During this process, they would have small arguments because of their different ways of using the bloodline powers. However, these arguments would actually make them understand each other better. As time passes, they become closer and closer, and the relationship develops from acquaintances to friends, and finally, lovers. Their Uzumaki bloodline would be like a thread that ties them together throughout the development of their relationship.
It might develop through shared battles. As Naruto uses his godlike powers in fights, Naruko sees his strength and determination, and she is drawn to him more.
They can start by simply spending time together. For instance, going on missions side by side. This allows them to get to know each other's fighting styles and personalities better. As they face challenges during these missions, they start to rely on each other more.
The relationship could develop through shared experiences. For instance, they might go on a mission together where they have to rely on each other to survive. Naruto could see the Naruko clone's determination and courage, and she could see his kind heart. This mutual admiration could lead to a deeper emotional bond. Another way is through Naruto teaching the Naruko clone about things she doesn't understand, like the history of the village or certain jutsu. This teacher - student dynamic can slowly transform into a romantic relationship as they get closer.
If they were twins, it would change the story in many ways. For starters, Naruto might not be as lonely as in the original story. Having a twin sister like Naruko would mean he has a constant companion and supporter. The dynamic in the village towards them would also be different. Instead of just one 'outsider' (Naruto), there would be two. This could either double the discrimination or create a situation where the villagers have to re - evaluate their views. In battles, they could work as a team more effectively. For example, in the fight against Pain, Naruko could have been there to support Naruto, and together they might have defeated Pain more easily. Also, their relationship with Sasuke would be different. Naruko could potentially have a different influence on Sasuke compared to Naruto.
It could be that Naruto adopts Naruko when she is very young. He would then become a father - figure to her. He'd make sure she has a proper education at the ninja academy. He'd also protect her from any threats, like the Akatsuki. As Naruko grows up, she might start to have her own ideas about how to be a ninja, which could lead to some interesting conflicts and resolutions between her and Naruto.
Their relationship could develop into a strong partnership. Since they both have godlike powers, they understand each other's struggles and responsibilities better. They might start training together more often, sharing new techniques and strategies. This would lead to a deep respect for each other's abilities and a closer bond.
Their relationship would likely become more protective. Kakashi, being the father, would be very watchful over Naruko. He would be constantly worried about her safety and the safety of their unborn child. Naruko, on the other hand, might become more reliant on Kakashi for emotional support.
In a fanfic, once they have a baby, Naruto and Naruko's relationship would shift. Naruto would be more home - bound, eager to be with his family. He would value Naruko even more as the mother of his child. Naruko, on the other hand, would see a new side of Naruto as a father. They would communicate more about the baby's future, like what kind of ninja the baby should be. Their relationship would be centered around the family unit now, with their love evolving to include their new addition.
In this fanfiction, Naruto and Naruko's characters can be developed through their shared experiences. They could face discrimination or special treatment because they are twins. Naruto, who is used to being an outcast, might handle it one way, while Naruko could have a different reaction. This would lead to them growing as individuals and as a pair. They could also develop by learning from each other's mistakes. For instance, if Naruto rushes into a fight, Naruko could teach him the value of planning, and Naruto could show her the importance of believing in oneself no matter what.