The training could make Naruto more self - reliant. Danzo would probably push Naruto to rely on his own skills rather than always depending on his friends or the power of the Nine - Tails. This could lead to Naruto developing new techniques and strategies on his own. He'd grow as a ninja in a way that's different from his growth under other mentors, like Kakashi or Jiraiya. His confidence would also come from his own achievements in training rather than just his natural abilities.
Naruto's character would likely become more complex. Danzo's training methods are strict and often involve a certain ruthlessness. Naruto, used to more open - minded and friendly training from the likes of Jiraiya, would have to adapt. He might become more calculating and less impulsive, which could be both good and bad. Good in that he'd be a more strategic fighter, but bad in that he might lose some of his charm and spontaneity that his friends love him for.
The training could also make Naruto more disciplined. Minato and Kushina were both highly disciplined ninjas. Their training methods would likely instill in Naruto a sense of order and routine. He would learn to manage his time better for training, and also be more meticulous in his study of jutsu. This new - found discipline could help him in all aspects of his ninja life, from mission planning to combat.
One possible plot could be that Danzo, despite his controversial nature in the original Naruto series, sees potential in Naruto. He might train Naruto in the ways of stealth and intelligence gathering. This could lead to Naruto having a more diverse skill set, different from what he learned from Jiraiya. Maybe Danzo would teach Naruto some of the Root's unique jutsu, which Naruto could then adapt to his own style, making him an even more formidable ninja.
There could be a fanfiction where Danzo trains Naruto after realizing that Naruto's unique chakra and ability to make friends could be harnessed for the Root's purposes. However, Naruto being Naruto, he would try to influence Danzo to use these skills in a more positive and moral way, leading to an interesting dynamic between the two characters.
Well, Naruto's character would be severely altered. Danzo is all about the end - justifying - the - means type of person. Naruto would be trained in a very different way. He'd probably be more proficient in stealth and assassination techniques rather than the flashy jutsu he learned under Jiraiya. His sense of justice would be warped. Instead of believing in everyone and trying to save his enemies, he might be more inclined to eliminate threats preemptively, like Danzo. His relationships would also be affected. He might not have the same close - knit group of friends as he did in the original story.
Naruto could also become more vengeful. If he survived the experiments, he would likely be angry at Danzo for what he had done. This could lead to a darker side of Naruto emerging, where he is focused on getting revenge rather than his original goal of becoming Hokage and being accepted by the village. He might be more willing to use force and be less forgiving.
Naruto would become more well - rounded. With Hiruzen's training, he'd gain more discipline. In the original, Naruto was a bit of a wild card. But under Hiruzen, he'd learn to control his impulses better. For example, in battles, he'd think more strategically instead of just charging in.
The early training would enhance Naruto's ability to empathize. Jiraiya has been through a lot in his life, and he could share his experiences with Naruto. Naruto, in turn, would be able to understand the pain and struggles of others better. This would make him not just a stronger ninja, but also a more well - rounded and compassionate person in the village.
Well, Naruto might become more confident earlier. Since Kakashi is a great teacher, Naruto could pick up advanced techniques faster. He would likely have a stronger bond with Kakashi too, which could influence his view of himself as a ninja.
It could make Naruto more of a risk - taker. Deadpool's fearless attitude might encourage Naruto to step out of his comfort zone more often.