Perhaps a mysterious old hermit who has been secretly studying the Jinton for decades. He could emerge from seclusion to pass on his knowledge to a worthy successor, like a new generation of ninja. He might have a strange appearance and a quirky personality, adding an interesting dynamic to the fanfiction. Another potential new character could be a villain who uses a corrupted form of the Jinton release. This villain could be after a powerful artifact that amplifies the Jinton's power, and the heroes have to stop him.
There could be a young prodigy from a small, unknown village who has a natural affinity for the Jinton release. This character could come to the Hidden Leaf Village to learn more about controlling it and end up befriending Naruto and his friends.
It could be a new character who was born with the shadow release ability but was hidden away from the ninja world until now. They would be the center of the story as they learn about their powers and face the challenges that come with it.
One potential main character could be a new ninja who discovers they have the Ink Release. They are an outcast in their village at first because of this strange power but then learn to master it and become a hero. For example, a young orphan who is bullied for having this unusual ability.
Sasuke is also a likely popular character in such fanfiction. His natural talent and thirst for power make it interesting to see how he would interact with the jinton. Maybe he would seek to steal the knowledge of the jinton from someone or be in a rivalry with another character who uses it.
One interesting concept could be how the Jinton release is mastered in different ways. Maybe a character discovers a new form of Jinton that combines with other chakra natures, like a Jinton - Lightning combo for a super - fast and powerful attack.
Another aspect could be the world - building around Jinton. In the Naruto universe, Jinton is a significant jutsu. A fanfic could expand on how it affects the balance of power among the ninja clans. It could also explore the origin of Jinton in more detail, whether it was discovered accidentally or through a long - term research by a certain group.
It's hard to say for sure. But perhaps there could be ninjas from a far - off land that we haven't known about before.
One potential new character could be a sage who was there during Kaguya's time and has been in hiding ever since. This sage could have knowledge about the true nature of Kaguya's powers and how Naruto can control and use them properly. He might also be a bit of a trickster, making Naruto go through various trials to prove himself worthy of this knowledge.
Another potential new character could be a fellow lost soul. This character could be from another village or even another dimension. Together with Naruto, they could try to find a way out of the darkness while sharing their different experiences and knowledge.
There could be a mysterious mentor figure who guides Naruto in his secret life. This person might have unique abilities and a deep understanding of the ninja world's secrets. Another potential new character could be a spy from another village who discovers Naruto's secret life and tries to use it to their advantage.
Well, in this fanfiction, we might see some new characters related to the Nine - Tails' origin. Maybe there are other tailed beasts' hosts from a long - lost clan who come to offer their knowledge on handling such a situation. Additionally, there could be a hermit who has been observing Naruto from afar and now steps in to guide him through the difficulties of having a broken seal. And don't forget about the potential dark side characters, like a sorcerer who wants to use Naruto's broken seal to open a portal to a dark dimension.