Without having read the specific 'Obito Story Ligth Novel', it's difficult to say for sure. But generally in stories related to Obito from Naruto, themes like redemption, love, and the consequences of war are common.
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.
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.
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.
Yes, there are quite a few. You can check out platforms like Fanfiction.net or Archive of Our Own. Some popular ones might focus on Naruto's relationship with the Nine - Tails' Jinchuriki form. For example, stories where they develop a deep emotional bond through shared experiences and battles.
Naruto could be one of his allies. Naruto has this knack for seeing the good in people and would probably be willing to give Obito a chance to redeem himself. Also, Sakura, with her skills as a medic - ninja, could be an ally. She might help heal Obito if he was injured during the war and see the potential in him to be a force for good.
One common theme is the power of understanding. Since both Naruto and Jinchuriki have a connection to a tailed beast, they understand each other's struggles. Another theme is sacrifice. They might be willing to sacrifice for each other because of their love. For example, in some fanfictions, a Jinchuriki would risk their life to save Naruto or vice versa.
First, focus on their backstory. Maybe they were an orphan who was chosen to be the Jinchuriki and had a tough upbringing because of it. This would shape their personality as someone who is both strong - willed but also has insecurities. Second, explore their relationship with Matatabi. They could start by hating the fact that they're a Jinchuriki but as they get to know Matatabi better, they form a unique bond. Third, show their growth in terms of power. Start with them being unable to control Matatabi's power at all and then gradually become a force to be reckoned with.
One possible scenario could be that the 5 - Tailed Jinchuriki has some sort of special power that draws both Itachi and Karin. Maybe Itachi is initially interested in the Jinchuriki for strategic reasons related to his Akatsuki duties, while Karin is intrigued by the unique chakra of the Jinchuriki. As the story unfolds, they all find themselves in a complex web of relationships and power struggles. Itachi might be conflicted between his loyalty to the Akatsuki and his growing feelings towards the Jinchuriki and Karin. Karin, on the other hand, could be using her own abilities to try and get closer to both of them for her own survival and perhaps a bit of romance.