Another possibility is that an original character created specifically for the fanfic could be the main character. This new character could be the one who stumbles upon the chakra fruit first and then has to navigate the Naruto world with this new power, facing both friends and foes along the way.
It really depends on the specific fanfic. But it could be Naruto himself, as he's the central character in the original series. He might be the one to discover or interact with the chakra fruit in some significant way.
Naruto himself is often involved. Since he is the main character of the original series, it's natural for him to be part of fanfictions related to the chakra fruit. He might be the one to discover it or have to protect it from villains.
It really depends on the specific fanfic. But it could be Naruto himself, as he often has new abilities or storylines in fanfics. He might be the one to master the chakra chains in a unique way.
I'm not sure specifically as it's a fanfic, but it could include Naruto himself. He might have a special connection to the chakra paper in this story.
I'm not sure specifically who the main characters are in this fanfic without reading it. But it could be new characters that are introduced because of this special chakra concept, or it might focus on existing Naruto characters like Naruto himself or Sasuke, and how they interact with the special chakra.
Sasuke could also be a main character in such a fanfic. Maybe he is initially jealous of Naruto getting the chakra armor and there could be a rivalry between them as they both try to master the power it offers. And Sakura might also be involved, perhaps as the one who helps heal the wearer of the armor when they get injured during battles or training.
It depends on the specific fanfic. However, it could be Naruto himself, exploring new aspects of his relationship with nature chakra. Or perhaps a new character created by the fanfic author who has a special connection to nature chakra. Another possibility is Sasuke, as he could also be delving into the mysteries of nature chakra in the fanfic.
Often, Naruto himself would be a main character as he has a strong connection to chakra in general. He might be exploring and mastering the rikudou chakra in the fanfic.
In a fanfic where Naruto eats the chakra fruit, he might gain an extraordinary boost in power. His chakra reserves could become limitless, allowing him to perform powerful jutsus without exhaustion. He could also potentially gain new abilities related to the nature of the chakra fruit, like enhanced speed or the ability to manipulate chakra in unique ways.
Well, one interesting idea could be the unique powers that the chakra fruit bestows. It might give the character abilities that are different from the normal chakra - based powers in Naruto. For example, it could grant the power to manipulate time on a small scale related to chakra usage.
He might gain an enormous boost in his chakra reserves. This could make his jutsus much more powerful and enable him to perform complex techniques with ease.