The Naruto world would be turned upside down. With Naruto being raised by Kaguya, his understanding of chakra and the ninja way would be completely different. He might introduce new forms of jutsu based on Kaguya's ancient knowledge. The balance of power among the ninja clans would be disrupted. His upbringing by Kaguya could also lead to a change in the social structure of the ninja villages. For example, he might promote a more hierarchical system similar to what Kaguya might have been used to, instead of the more democratic - ish system that was in place in the original story.
Well, if Naruto was raised by Kaguya in fanfiction, he'd probably be more isolated from the normal ninja community. Kaguya has her own complex history and motives. Naruto could be trained in very different combat styles, more focused on raw power and less on the teamwork - based ninja training he would have received in the original story. Also, his understanding of the tailed beasts might be completely different as Kaguya has her own connection to chakra and the world's origin.
The plot would change a great deal. For starters, the Akatsuki might not be as big of a threat to Naruto. Since he's being raised by Kaguya, he'd likely be much more powerful from the get - go. The relationship between Konoha and Naruto would be very different. Instead of being an outcast at first, he could be seen as a potential danger because of his connection to Kaguya. Also, the search for power and the various power - up arcs in the original story might not exist in the same way. Naruto would already have access to powerful Otsutsuki techniques.
Naruto's character would develop in a very different direction. He'd likely be more stoic and less impulsive. Since Kaguya has a more detached view of the world, Naruto might inherit some of that. He would be more calculating in battles, using his powers in a more precise way rather than relying on his usual head - on approach. His sense of justice might also be warped as he grows up under Kaguya's teachings, which are different from the values he was taught in the original story.
Well, Naruto's character would be drastically different. Growing up with Kaguya, he might have a more aloof and powerful aura. Kaguya could teach him her unique jutsu from the start. He'd probably be more in touch with the Otsutsuki side of his powers. His sense of justice might still be there but expressed in a more cold - calculated way, like Kaguya. He'd also have a very different relationship with the other ninja in the village as he'd be seen as an outsider due to his unique upbringing.
If Naruto is raised by Kaguya in fanfiction, his character could become more complex. He might inherit some of Kaguya's power and knowledge, which would change his approach to battles and relationships. For example, he could be more reserved and calculating like Kaguya, rather than the impulsive and passionate Naruto we know. This new upbringing could also isolate him from his friends at first as he might seem different.
Well, Naruto could change Kaguya in the fanfiction by introducing her to the concept of redemption. Given his own journey of facing his inner demons and coming out stronger, he might convince Kaguya that she can atone for her past sins. He may take her on a journey through the ninja world, showing her how people have rebuilt and thrived despite the chaos she once caused. This could make her re - evaluate her actions and change her perspective on the world and her place in it.
Yes, there are likely some fanfictions that explore a special connection between Naruto and Kaguya. In some fanfictions, authors might create scenarios where Naruto, due to his unique abilities and kind - hearted nature, manages to reach out to Kaguya in a way others couldn't. This could involve him understanding her past and trying to bring some form of redemption or peace to her.
In the fanfiction, Naruto could enter Kaguya's mind. He might discover her past traumas that led her to become so power - hungry and vengeful. By understanding her pain, Naruto could offer her forgiveness and a new path. He could show her a vision of a future where she is part of a united world, not feared or hated, but respected and loved if she changes her ways. This could be a powerful incentive for Kaguya to change.
Well, perhaps Kaguya would use her otherworldly powers to protect Harry from Voldemort. Maybe she'd teach him some unique magic that's different from the wizarding world in Harry Potter. For example, she could introduce him to some ancient spells from her own realm.