Naruto may develop a deeper sense of responsibility. With Kami's training, he might be given new powers or knowledge that come with the obligation to use them for the greater good. This could make him more aware of his role in the world and more responsible in his actions. He would think more about the consequences of his choices and how they affect not only himself but also those around him and the world at large.
Naruto might become more patient. Kami's training is likely to be intense and require a lot of concentration. So, Naruto would have to learn to be patient to master the new skills.
He could become more humble. Kami is a powerful being, and being trained by such an entity would make Naruto realize there is always more to learn. He would understand that his previous achievements are just a small part of his growth journey and become more humble in his interactions with others.
His leadership qualities start to shine through more. Naruto was always a bit of a leader, but now he commands more respect. He's more empathetic too, understanding the struggles of his fellow villagers better after his experiences with Jiraiya. This new - found empathy makes him more relatable and someone people are more willing to follow.
His once optimistic and determined personality would turn cynical. Instead of seeing the good in people, he would suspect everyone. For example, he would no longer trust his friends easily. His sense of humor would disappear, replaced by a cold and sarcastic attitude. He would become more secretive and withdrawn, not sharing his thoughts and feelings like he used to.
Well, it could make the plot more complex. Naruto's new ability might give him an edge in battles. For example, if he summons kami during a fight with a powerful enemy like Sasuke, it could turn the tide. Kami might have special powers that Naruto can use to his advantage, like some sort of super - healing or powerful attack that was previously unavailable to him.
Well, he might start with more intense physical drills. Like running longer distances with heavier weights. This would build his stamina and strength much faster than before.
When Naruto is trained by the Shinigami in a fanfic, his ninja skills are bound to change significantly. His Rasengan, which was already a powerful attack, could be upgraded to something more formidable. It could now have the ability to target the soul of the opponent directly. His stealth skills might also improve as he learns to move more like the Shinigami, which is a being that can appear and disappear mysteriously. Additionally, his ability to communicate with other beings, like summons, could be enhanced as he gains a better understanding of the spiritual realm through the Shinigami's training.
Well, Kakashi might introduce Naruto to more strategic ways of fighting. For example, he could teach Naruto how to better analyze his opponents before attacking. Naruto, who was previously more impulsive, may start to hold back and look for the right moment to strike, like Kakashi does with his Sharingan.
They could become stronger. Naruto might gain new forms of his jutsu, and Sakura could become more confident in her abilities.
His personality might become more aggressive. The demon nature could bring out his primal instincts, making him less patient and more prone to anger.
Naruto's training would likely become more intense. He might focus on mastering new jutsus like the Rasengan variations. He could also train in stealth and strategy more, as those are important for a Chunin. For example, he could practice sneaking up on opponents and setting up traps.
His abilities would be enhanced greatly. He could have better chakra control. For instance, he could use chakra more efficiently and might be able to perform jutsu with less effort. His physical abilities like strength, speed and agility would also improve. He could run faster than normal ninjas and jump higher.