If Naruto is Mito's brother in the fanfiction, it would change his backstory significantly. His family's history and the events that led to his isolation as a child might be different. He could have had a more stable family environment with Mito around. This might also affect his character development. Instead of being the lonely outcast that we see in the original story, he could be more confident and less desperate for recognition. And in terms of his abilities, he might have developed different skills based on the Uzumaki clan's heritage that Mito could have passed on or influenced.
In this fanfiction scenario, Naruto being Mito's brother would likely impact the political landscape too. The Uzumaki clan has always had an important role, and with this new relationship, Naruto could have more influence in diplomatic matters. Maybe he would have been more involved in the affairs of the Hidden Leaf earlier. Also, his relationship with the other clans, especially those related to the tailed beasts, might be different. For example, his connection with the Uchiha clan could be altered as he has this new Uzumaki - related status.
The relationship could also affect the power balance. Naruto and Madara together would be an extremely powerful force. Other villages might view this union with suspicion or try to form alliances with them. This would lead to a shift in the political and power dynamics of the Naruto world, with different villages realigning their strategies based on this new brotherly relationship.
In this fanfiction, their relationship becomes more of a partnership. Instead of Naruto just using the Kyuubi's power, they work together as brothers. Naruto might start to understand the Kyuubi's feelings and motives better.
Well, it could change the storyline in many ways. For one, Naruto would have an even stronger support system. Gaara, being overprotective, might prevent Naruto from getting into some of the more dangerous situations he usually jumps into. This could potentially slow down Naruto's growth in terms of combat experience as he'd be shielded from some threats. But on the other hand, it could also give Naruto more emotional stability, which could in turn help him better control his chakra and learn new jutsus faster. Gaara's presence as an overprotective brother could also affect how the other characters interact with Naruto. Some might be more cautious around him because they know Gaara is watching over him like a hawk.
Well, it would completely turn the story upside down. The family relationships are so crucial in Naruto. If Naruto were Kushina's grandfather, it would mean a whole new set of character dynamics. For example, Minato's relationship with Naruto would be extremely different. Instead of being his father, he would be some distant relative. And Naruto's connection to the Uzumaki clan would be much more complex and ancient. It could also change how Naruto obtains his powers. Maybe he would inherit some ancient Uzumaki abilities in a different way than in the original story.
Well, it could change the perception of the origin of chakra in the Naruto universe. Since Kaguya was the first to possess chakra, her interaction with Naruto might reveal more secrets about chakra's true nature. Also, the political situation in the ninja world could be affected. With Kaguya's existence, different villages might form new pacts or rivalries depending on how they perceive her threat or potential power. Naruto would be in the middle of all this, trying to keep the peace and understand the implications of Kaguya's arrival.
Well, if Naruto were Tsunade's twin brother, the whole dynamic of the story would be different. Firstly, Naruto might have had access to more advanced medical ninjutsu training from a young age. Tsunade is a master in this field, and she could have passed on her knowledge. Also, Naruto's standing in the village might have been different. He might not have been as much of an outcast since he'd be related to one of the Sannin. His access to resources and the respect he received could have been much higher right from the start.
If Naruto has the power of Sans Fanfiction, it might introduce some unique interactions. For instance, Sans' power of dodging attacks effortlessly could be combined with Naruto's own combat skills. This could lead to some really interesting fight scenes where Naruto seems almost unhittable. Also, it could affect how he approaches his enemies, as he now has a different set of powers to rely on.
The power dynamics would shift significantly. Naruto already being very powerful, with the connection to Kaguya, he might be seen as an even greater threat or asset. Allies and enemies would likely reevaluate their relationships with him.
Well, it completely flips the original story. For starters, all the relationships get turned upside down. Naruto, being the father, would mean he was the one who made all the big decisions before Minato was born. It also changes the whole dynamic of how Minato would view Naruto. Instead of being a son looking up to his father, it would be a son trying to understand his father who is younger than him in the normal timeline. And Naruto's friends would now be his son's predecessors. It's a really wild concept that changes the Naruto universe we know in a big way.
In a fanfiction where Naruto is Rias' brother, the Naruto storyline would be altered significantly. Naruto's nature as a person might change due to the influence of the devil society. He may become more sly or strategic in the way devils are. His fighting style could incorporate more magic - like elements from the DxD world. His backstory would now involve being part of a devil family. His relationships with his friends in the Naruto world would be less prominent as he'd be more involved with the devils. For example, instead of going on missions in the ninja world, he'd be involved in devil - related tasks to protect his sister and their family's status.