Naruto himself could be the main character. Given his adventurous and selfless nature, he might be the one to make the contract to save his friends or the whole Hidden Leaf Village. He would then have to deal with the consequences and powers that come with the contract.
I'm sorry I don't know specifically as it's a fanfic. It could potentially feature Naruto himself, or perhaps some other well - known characters like Sasuke or Kakashi. Since it's related to the Shinigami, it might also introduce new characters who are somehow connected to this death - god - like entity.
It could be Naruto himself. Imagine Naruto encountering a rogue Shinigami and having to deal with the chaos it brings. He would be the perfect main character as he is always eager to face challenges and protect his friends and the village.
Sasuke could also be a main character in such a fanfic. Given his quest for power and his complex personality, his encounter with the Shinigami could lead to some really interesting character development. He might be tempted by the Shinigami's power or be forced to make difficult choices that would change his path.
In 'naruto contract of the shinigami fanfiction', the key elements could be centered around the plot developments that the contract triggers. For instance, it could lead to a whole new arc where the character has to face off against other forces who also have an interest in the contract. It might also introduce new characters related to the Shinigami or those who are affected by the contract. Additionally, the moral implications of the contract could be a significant element, as the character has to decide whether the power it offers is worth the potential consequences.
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.
I'm not entirely sure as it's a fanfic. But it might involve some kind of contract within the Naruto universe related to the Shinigami, like a deal made with a death - god - like entity. Maybe a character has to give something up in exchange for power or knowledge.
Sasuke could also be an interesting choice. He is always seeking power, and a rat contract could offer him new ways to gain information about his enemies. He could use the rats' stealth abilities to his advantage in his quest for revenge.
Naruto himself could be an interesting main character in a snake contract fanfiction. Imagine Naruto having to take on the snake contract for some reason, like to save Sasuke who has fallen deeper into Orochimaru's influence. It would be a huge change for him as he's always been associated with the toad contract. But with his determination, he could learn to master the snake powers in his own unique way.
Maybe it's a new villain created specifically for the fanfiction. This villain could have powers that are extremely dangerous to Naruto, like the ability to drain his chakra completely. So the Shinigami has to step in to save Naruto from this new and powerful foe.
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.