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.
The training makes Naruto more confident in his abilities. Jiraiya constantly challenges Naruto and as Naruto overcomes these challenges, he realizes his own strength. He starts to believe in himself more, which is evident in the way he faces stronger opponents without hesitation later on. Also, Jiraiya's teachings about the ninja way and the importance of protecting those you love make Naruto more determined and focused on his goals.
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.
Jiraiya's training in the fanfiction might focus on Naruto's inner strength as well. He could help Naruto better understand and control the Nine - Tails' power. This new - found control would give Naruto a sense of calm and authority. His character would shift from being just a loud - mouthed underdog to a more respected and powerful ninja. Naruto would also learn about loyalty and sacrifice from Jiraiya, which would shape his values.
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.
Jiraiya's serious training helps Naruto a great deal. It makes Naruto more disciplined. He has to follow strict routines and endure tough physical and mental challenges. This helps him become stronger both in terms of his ninja skills and his ability to face difficulties in general.
If adopted by Jiraiya, Naruto would probably be more self - assured. Jiraiya would instill in him a sense of pride in his abilities. He'd also be more of a free spirit. Jiraiya's influence would mean Naruto would be more likely to take risks and explore new things without as much hesitation as in the original story. He might also be a bit more flirty, as Jiraiya has his own charm when it comes to the opposite sex.
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.
Naruto's abilities would transform significantly. Yoda's training would likely focus on his mental discipline. This could lead to Naruto having better control over his emotions during battles, which in turn would make his attacks more calculated. His ninjutsu could gain a new level of power as he incorporates some of Yoda's teachings about energy manipulation. Also, his ability to adapt to new situations would be sharpened, just like a Jedi has to be ready for any situation.
They could become stronger. Naruto might gain new forms of his jutsu, and Sakura could become more confident in her abilities.
Well, it would probably make Naruto's relationship with Tsunade more strained. Since Tsunade was close to Jiraiya, Naruto's hatred for him might make Tsunade view Naruto in a different light, and Naruto might also be less trusting of her. For example, Naruto might avoid going to Tsunade for help as he used to.