Obviously Naruto would be one of the main characters since the title implies he is the substitute shinigami. There might also be other characters from the Naruto universe, like Sasuke or Sakura, who could be involved in Naruto's new role. They might either support him or be skeptical of his newfound powers and responsibilities.
The main character is Naruto as he is the substitute shinigami. Alongside him, it's likely that his closest friends from the Naruto series will be involved. Sakura might be concerned about Naruto's new role and try to use her medical skills to help if there are any physical or spiritual consequences. Sasuke could be either an ally or a source of conflict, depending on how he views Naruto's new power. And there may be new characters introduced as well, such as other shinigami or beings from the afterlife that Naruto has to interact with.
In this fanfiction, Naruto is the central figure as he is the substitute shinigami. But we can also expect to see characters from both the Naruto world and potentially some characters related to the shinigami concept. For example, there could be some kind of spirit guide or other shinigami - like figures who help Naruto understand his new role. His friends in Konoha, such as Kakashi, might also play important roles, perhaps trying to understand how Naruto's new role affects their village and their own lives.
Well, in this 'naruto is a substitute shinigami fanfiction', it could be that Naruto is thrust into the role of a substitute shinigami due to some strange event. Maybe he has to use his ninja skills in a new way to carry out the shinigami duties. He might have to interact with spirits and otherworldly beings, and it could also lead to changes in his relationships with his friends and comrades as he tries to balance his new role with his old life as a ninja.
Obviously, Naruto is one of the main characters. And of course, the Shinigami King. There may also be other characters from the Naruto series who interact with Naruto in the context of his relationship with the Shinigami King, like Sasuke or Kakashi.
Since it's a Naruto - based fanfiction, Naruto is likely to be one of the main characters as he is the Jinchuuriki. There might also be other characters from the Naruto universe such as his friends like Sasuke, Sakura, etc. who could be involved in the story related to Naruto's connection with the Shinigami.
Naruto is surely the central character in this fanfiction. Given the title, the Shinigami is another key figure. It's possible that characters like Kakashi could also play important roles. Maybe he serves as a mentor to Naruto in understanding the powers and responsibilities that come with being the champion of the shinigami. Also, villains or antagonists related to the shinigami's realm might be introduced as main characters to oppose Naruto.
Apart from Naruto and the Shinigami, there could be other characters from the Naruto universe. For example, Sasuke might be involved. He could be either jealous of Naruto's new blessing or he could end up being an ally in Naruto's journey with this new power. Also, Kakashi could be there to guide Naruto in understanding and using the power given by the Shinigami. Maybe there are also some original characters created specifically for this fanfiction that are related to the Shinigami's realm or have some connection to Naruto's new situation.
Obviously Naruto would be one of the main characters, as the title implies he is the son of the Shinigami. There might also be other Naruto -verse characters like Sasuke, Sakura, and Kakashi who could play important roles. Maybe the Shinigami itself might be a character in some form, either as a physical presence or a guiding force in Naruto's life.
Obviously, Naruto would be one of the main characters since it's in the title. And the Shinigami who gives the gift is likely to be another important character.
Since it's a Naruto - based fanfiction, Naruto is definitely a main character. In addition, it could feature the Hokages, as they often play important roles in Naruto's life and they might be involved in the mystery of the Shinigami's left hand. Also, villains from the Naruto series could show up. For example, Orochimaru might be interested in this power of the Shinigami's left hand and try to take it from Naruto, making him a major character in this fanfiction as well.
Obviously Naruto would be one of the main characters since the title implies his role. And then, there might be characters representing kami and shinigami. There could also be Naruto's friends like Sasuke, Sakura, etc. who would be involved in the story and react to Naruto's new status.
Obviously, Naruto would be one of the main characters since it's about him being the son of kami and shinigami. There might also be other characters from the original Naruto series like Sasuke, Sakura, and Kakashi who could be involved in his new story.