Naruto's character development in this fanfiction would be complex. He'd probably grow up with a sense of superiority due to Orochimaru's powerful teachings. But at the same time, he'd lack the warmth and compassion that came from his relationships in Konoha. He might be more self - centered, focused on his own power and survival. He may not have the same sense of justice as in the original Naruto, as Orochimaru's motives are not in line with the general good. And his relationship with his peers would be more of a power struggle. He might not form the same deep friendships, but rather see others as either tools or threats.
In some fanfictions, Orochimaru might develop a sense of loyalty towards Naruto. After being around Naruto for a while, he could see Naruto as someone worthy of his loyalty. This could lead to him being more open to working with the Hidden Leaf and helping Naruto in his various missions. He might even sacrifice his own interests to protect Naruto at times, which is a complete turnaround from his initial character.
Naruto's character would likely become more conflicted. He has always been on the side of good, and joining Orochimaru, even if for a good reason, would put him in a morally gray area. His view of power might change as he is exposed to Orochimaru's unorthodox ways of obtaining it.
Naruto's character would likely become more complex. With Orochimaru as his guardian, he'd be exposed to different ways of thinking. He might become more cautious, as Orochimaru is a master of manipulation. But he'd also learn a great deal about jutsu and ninja history. His view of the world might expand, and he could become more understanding of the gray areas in the ninja world.
Naruto might become more cautious. Since he has faced Orochimaru before, he knows the kind of danger he represents. So he could start to analyze situations more carefully before jumping into action.
He might become more stoic. Given the nature of Shinigamis, Naruto could grow up with a sense of calmness and detachment that's not typical in the original Naruto.
Naruto might become more sensitive and perceptive. Since kunoichi often have a different way of looking at things compared to male ninjas, Naruto could pick up on those traits.
Naruto's character would become more adventurous. Growing up with pirates, he'd be exposed to a life of constant exploration. His sense of justice would likely blend with the pirates' code. He might be more carefree and less bound by ninja traditions. His social skills would be different too, more in line with the rowdy pirate crew. He'd probably be louder and brasher in his interactions.
His character would develop with a stronger sense of loyalty towards Jiraiya. He would inherit Jiraiya's values like protecting the weak and seeking justice. Naruto would also be more well - versed in the ninja arts and history due to Jiraiya's teachings. This would make him more respected among his peers at an earlier stage. Moreover, he might be more patient and less impulsive as Jiraiya could teach him the importance of thinking before acting.
Naruto's character would likely become more reserved in some ways. Yamato is not as boisterous as some of Naruto's other influences, so Naruto might think before he acts more often. His fighting style could also be more strategic, incorporating Yamato's wood - style and knowledge of chakra control.
Naruto's character would likely be more distrustful of traditional ninja institutions. Since he's raised by a rogue, he might see the established ninja villages as corrupt or overly restrictive. He could be more rebellious and less likely to follow orders blindly.