It could also be a form of building alliances. By reaching out to the Jinchuriki through letters, Naruto is establishing a connection. This can be important in the Naruto universe where having allies is crucial for the safety of the villages and the world at large. He may be hoping to create a united front among the Jinchuriki against common enemies.
A possible fanfiction could be centered around the Jinchuriki's role in a major battle. For example, in a war against an enemy ninja force, the Jinchuriki could unleash Matatabi's power in a strategic way to turn the tide of the battle. They might combine Matatabi's fire - based attacks with other ninja techniques they've learned, like water - style jutsu to create a steamy and powerful defense or offense. Also, their bond with Matatabi could give them an edge in terms of sensing the enemy's moves before they happen.
Gaara is a very likely recipient. He was a Jinchuriki like Naruto and they have a strong bond. Naruto might send him letters to check up on him and continue their friendship.
The 'naruto jinchuriki of the world eater fanfiction' might center around the Jinchuriki's journey. Maybe they have to face challenges that come with being associated with a 'world eater'. This could involve battles against other powerful forces in the Naruto universe who either fear or want to use the power of the 'world eater' within the Jinchuriki. It could also delve into the Jinchuriki's relationships with other characters, like how Naruto's friends might react to this new and dangerous situation.
Well, perhaps Naruto could be transported to the world of Arceus. He might discover his own chakra has some unique connection to the power of Arceus. Maybe he has to team up with Pokémon to fight against some dark forces that are threatening both the Pokémon world and his own ninja world.
Well, the plot could involve Itachi having to deal with the power of the tailed beast within him. Maybe he has to constantly struggle to control it while still maintaining his calm and collected exterior. He could use the power in unexpected ways to protect his village or those he cares about, like Naruto does with the Nine - Tails.
In this kind of fanfiction, Naruto might grow up with a better understanding of his Jinchuriki status from the start. He could be trained in a more specialized way. For example, he might learn unique jutsu related to the Nine - Tails' power earlier. Also, he could have more comrades who are also Jinchurikis, and they could form a strong bond, sharing their experiences and difficulties. This could lead to a Naruto who is more confident and in control of his power compared to the original story.
Well, it could be about Naruto having to deal with the power of two Bijuus. Maybe he struggles to control their combined power at first. He might face new and more powerful enemies who are after the power he now holds. And there could be a whole new arc of training to master this unique situation.
Well, it could be about Naruto somehow obtaining the power of Son Goku. Maybe there's a strange jutsu that fuses their powers. Naruto could use Son Goku's strength in battles, like having his speed and ki blasts along with his own ninja skills.
I think Naruto would start by defining what a Jinchuriki is and then share some stories about other known Jinchuriki to make it more understandable for Sarada.