In some fanfictions, Kaguya being sealed might lead to new mysteries emerging. For example, there could be hidden secrets or powers that were associated with her that now start to surface. This could draw in new characters or lead to new adventures for the existing ones. Maybe some of Kaguya's leftover chakra starts to influence certain events or people in unexpected ways.
If Kaguya is sealed in Naruto in a fanfic, Naruto could potentially use Kaguya's power for good. He might be able to access new jutsu or abilities that were previously unknown. However, there would also be risks. The power could be corrupting, like it was for Madara when he got some of Kaguya's power. Naruto would have to rely on his strong will and the support of his friends to keep from being consumed by it. He could also try to study Kaguya's power to find a way to break the cycle of hatred that has been plaguing the ninja world for so long.
One implication could be a significant power boost for Naruto. Since Kaguya was an extremely powerful being, having her sealed within him might give Naruto access to new levels of chakra and abilities. For example, he could potentially gain more control over space - time ninjutsu, which was Kaguya's specialty. This could make him even more formidable in battles against powerful foes.
The story could develop with the ninja world exploring new forms of ninjutsu or chakra control now that Kaguya's influence is no more. For example, they might discover new ways to harness natural energy without the fear of it being corrupted by Kaguya's power.
The story changes a great deal. Naruto becomes a sort of living prison for Kaguya's power. His relationships might be strained as people fear what he could become. The Hidden Villages might keep a closer eye on him.
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.
One consequence could be that Naruto has a constant struggle to keep Kaguya's power in check. He might experience internal battles within his mind as Kaguya tries to break free.
Naruto's relationship with his friends in Konoha would also change. They would be both in awe and a bit scared of him. Some might distance themselves out of fear, while others, like Shikamaru, would try to keep a close eye on him to make sure he doesn't do anything dangerous. His friends would also worry about Naruto's well - being, as having Kaguya sealed in him could potentially put a strain on his body and mind.
Kakashi can be a popular character too. His wisdom and combat skills can be useful in fanfic scenarios involving Kaguya. He could be a mentor figure to Naruto, guiding him in dealing with Kaguya - related threats or helping to decipher ancient ninja knowledge related to Kaguya.
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.