The symbiote might also have an impact on Naruto's personality. Since symbiotes often have their own sort of consciousness, it could lead to some internal conflict within Naruto. He might have to struggle to keep his own values while dealing with the symbiote's influence. On the other hand, if he can master it, he could gain a new level of confidence. Maybe it would give him an edge in his battles against stronger opponents like Sasuke or the Akatsuki members.
The symbiote could make Naruto's ninja way more about adaptation. Since the symbiote brings new physical abilities, Naruto might need to adapt his fighting style. His ninja way of never giving up could be enhanced as he now has to overcome not only his normal challenges but also the challenges of controlling the symbiote. For example, if the symbiote has a weakness to certain elements, Naruto would have to find ways to work around that while still staying true to his beliefs.
Maybe a magical amulet. This amulet could have special powers like protecting Naruto from genjutsu or enhancing his chakra control. Since Kami is a powerful entity in the Naruto universe, it makes sense for the gift to have some kind of extraordinary ability.
One possible plot could be that Naruto's new doujutsu gives him the ability to see the chakra flow in a more detailed way. This would enhance his combat skills as he could predict his opponents' moves better. He might also use it to understand the nature of different jutsus more clearly.
Well, if Kami gives Naruto a bloodline in fanfiction, it could completely transform his abilities. He might gain powers that are way more unique and powerful than his normal jutsu. For example, he could have some sort of elemental bloodline that allows him to control a new type of energy. This would make him even more of a force to be reckoned with in battles against tough opponents like Sasuke or the Akatsuki members.
His relationship with the older generations like Kakashi and Tsunade could shift. They would see Naruto as a more mature and capable ninja. Naruto could use the insights from his doujutsu to contribute more to the decision - making in the village, and they would respect his opinions more.
If the gift is a powerful weapon, it could give Naruto an edge in battles. For example, if it's a sword that can cut through any defense, he can face stronger opponents more easily, thus changing the course of his battles and his overall journey.
Maybe it's a completely new and unknown kami. A kami created specifically for this fanfiction. This kami could have unique powers and a different view of the ninja world compared to the existing characters in Naruto. It would add a fresh and exciting element to the story.
Maybe it's an existing character from Naruto who has been elevated to Kami status. For example, Tsunade could be turned into a Kami, and Naruto's relationship with her could be a very different dynamic from their previous ninja - leader relationship. Or it could be Kaguya, who was already a very powerful being, and in this fanfiction, she reforms and becomes a Kami and Naruto's wife.
In fanfiction, the 'kami' could be an original deity created by the author. This new 'kami' could have its own motives and reasons for giving a gift to Naruto. Maybe it's a kami that has been observing Naruto's journey and decides to interfere to help him achieve a greater purpose. It could be a kami associated with nature, like a kami of the wind or the fire, and the gift could be related to that element.