A possible plot could be that Naruto is a reincarnation of a powerful Shinigami. As he grows up in the Hidden Leaf Village, he starts to show strange abilities that are related to the Shinigami. He has to keep this a secret at first because people might fear him. Eventually, he meets other characters who have some connection to the Shinigami world as well. Together, they explore the secrets of the Shinigami and Naruto's true identity. Along the way, there could be battles against those who want to use Naruto's Shinigami powers for evil purposes, and Naruto has to struggle to use his powers for good and protect his village and friends.
The plot might involve Naruto being sent to the Shinigami realm for some reason. There, he has to adapt to the rules and powers of the Shinigami. He could make allies among the Shinigami and bring back some of their knowledge and powers to his own world, causing a stir among the ninja clans. He might also face challenges from Shinigami who don't trust him at first because he's an outsider.
Well, it could involve a character making a deal with a Shinigami. Maybe a ninja is on the verge of death and in order to gain some extraordinary power to save their village or loved ones, they make this contract. The Shinigami might demand something in return like a part of their soul or their future memories.
One possible plot could be that Naruto makes a deal with the Shinigami to gain more power to defeat a powerful enemy. In exchange, he might offer his own lifespan or something precious to him. Maybe he needs this power to save his village from a new, overwhelming threat like an ancient evil that has awakened.
Perhaps the female shinigami trains Naruto to have a better understanding of life and death. In the Naruto world, death is a significant concept, and with the shinigami's training, Naruto could become more in tune with the cycle of life and death. This might lead to him being able to communicate with the spirits of the dead, getting advice from past Hokages or his parents in a more profound way.
The plot could start with Naruto having strange dreams or visions related to his hollow and shinigami halves. He begins to notice that he has abilities that no other ninja has. His training then takes a different turn as he tries to understand and master these new powers. Maybe he discovers that his parents had some connection to the spirit worlds, which is why he has this unique nature. He then gets involved in a conflict between the forces of the hollows and the shinigami. With his ninja skills combined with his newfound powers, he has to find a way to broker peace or at least stop a war that could destroy all the worlds he cares about.
I'm not sure specifically as there could be many different plots in such a fanfiction. Generally, it might involve the Naruto character who is a Jinchuuriki (a host of a tailed beast) having some sort of connection or interaction with the Shinigami (the god of death in some contexts). It could be about how his Jinchuuriki powers are affected by this connection, or perhaps adventures that come from it.
Well, in this 'naruto champion of the shinigami fanfiction', it could be that Naruto is chosen by the Shinigami for a special mission. The Shinigami might see something unique in Naruto, like his strong will or his ability to never give up. So, Naruto is made the champion. As the champion, he could be tasked with maintaining the balance between the living and the dead in the Naruto world. This would likely involve battles against those who try to disrupt this balance, such as evil spirits or necromancers. He may also have to face his own inner demons and learn how to control the power of the Shinigami without being consumed by it.
One possible plot could be that Naruto discovers a hidden realm where Shinigami exist. He meets a particular Shinigami and is immediately drawn to their unique powers and personality. They start to form a bond as Naruto tries to understand the Shinigami's world and how it relates to his own.
Well, it could be about Naruto having some special powers or abilities related to being the son of a Shinigami. Maybe he can communicate with the dead more easily or has some sort of death - related jutsu.
One possible plot twist could be that Naruto has the ability to control the souls of the dead, inherited from his mother, the Fem Shinigami. This could lead to him being able to communicate with past Hokages in a more direct way than just through their chakra imprints. Another plot twist might be that Naruto has to face an enemy who is also related to the Shinigami realm and his connection to it is the key to victory.
I'm not entirely sure as it depends on the specific fanfiction. But generally, it might involve Naruto having some sort of divine or shinigami - related origin, which could lead to him having special powers or a different path in his ninja journey.