If Naruto creates Grimm fanfiction, perhaps he would imagine himself as a Huntsman in the Grimm world. He might use his shadow clones to outnumber the Grimm. His ninja skills like the Rasengan could be transformed into some sort of super - attack against the Grimm. Also, he could bring the concept of chakra into the Grimm universe and have the characters use it to fight the dark creatures.
Naruto's determination would likely make the heroes in his Grimm fanfiction extremely tenacious. They would never give up in the face of Grimm attacks. His sense of justice would ensure that the fanfiction has a clear line between good and evil, with the heroes always fighting for what's right against the Grimm.
One possibility is that he could rewrite his own adventures in a more humorous or self - deprecating way. For example, making fun of his early failures in ninja training.
His friends like Sasuke would most likely support him. Sasuke, having walked a long path of redemption, would see Naruto's vision of an empire as a way to finally achieve the peace they both have been longing for.
The purpose could be to protect the weak. Naruto has always been about protecting those who can't protect themselves. So his organization might focus on safeguarding small villages or groups that are vulnerable to attacks from rogue ninjas or larger, more aggressive villages.
I'm not entirely sure as I haven't read this specific fanfiction. But it might be a story where Naruto is somehow placed in the world of Grimm Faunus, perhaps with Naruto having to adapt to the new environment, new powers related to being a Faunus, and facing the threats that come with the Grimm in that universe.
Survival is also a big theme. When Naruto is thrown into the Grimm world, he has to use his skills to stay alive. This theme of fighting against the odds in an unfamiliar and often hostile environment is quite prominent. For example, in many fanfictions, Naruto has to face Grimm monsters much stronger than him at first. He has to quickly adapt and find ways to defeat them. Another theme could be the discovery of self. As Naruto navigates this new world, he learns more about his own abilities and limitations, and how he can grow beyond them. This is especially true when he encounters new magic or powers in the Grimm world that he has to incorporate into his fighting style.
Well, Naruto and Grimm fanfiction are from different fictional universes. Naruto is a well - known ninja - based anime, while Grimm fanfiction is based on the Grimm series. Maybe in this specific 'naruto is a grimm fanfiction', the author might be trying to cross - over the two concepts, like having Naruto characters in a Grimm - like setting, or using Grimm's narrative styles to tell a Naruto - related story.
Well, in such a fanfiction, Naruto might discover a new chakra ability that allows him to create Kirin. He could be in a tough battle where his usual jutsus aren't enough. So, he taps into some hidden potential within himself to form Kirin. Maybe he combines his own wind - style chakra with some newfound lightning - style chakra he got from a special training or encounter.
If Naruto creates a lightsaber, it could be related to his connection with Kurama. Kurama's chakra is extremely powerful. It's possible that this chakra could be harnessed in a way that can mimic the energy source of a lightsaber. Naruto, being the creative and adaptable ninja he is, would then figure out how to shape and control this new form of energy into a blade, much like a lightsaber. And he would surely use it to protect his friends and the Hidden Leaf Village.