His character would be much darker. He'd be more likely to use violence as a first resort. Instead of the kind - hearted Naruto we know, he might be cold - blooded in achieving his goals related to Jashin.
His character may become more conflicted. On one hand, he has his own moral code from being a ninja in Konoha. But serving Jashin forces him to question and sometimes violate that code. This could lead to a more cynical Naruto in some cases, as he sees the darker side of the world.
In a 'Naruto raised by Jashin' fanfic, Naruto would likely be an outcast in Konoha from the start. Since Jashin is a rather dark and feared cult - like figure in the Naruto universe. His appearance might be different too, maybe with some markings related to Jashin. His relationships with other characters would be strained. For example, he might not be friends with Sasuke as they have such different upbringings and beliefs. He could be seen as a threat by the village elders and constantly be under surveillance.
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 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.
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.
In 'naruto raised by orcs fanfiction', Naruto's character development would be a significant departure from the canon. He would grow up without the influence of the ninja academy and the Hidden Leaf Village. This would mean his understanding of right and wrong might be more in line with orcish values. He could become more territorial, like the orcs, and be more willing to fight for his new 'home' with the orcs. His ability to make friends might change too. Instead of befriending through shared ninja dreams, he would bond over orcish traditions and hunts. His overall personality would be a blend of his original Naruto - like tenacity and the orcish traits of strength and loyalty to the tribe.