One major change would be in Naruto's understanding of sacrifice. Itachi sacrificed a lot for the village, including his own reputation. Naruto, as his apprentice, would be exposed to this concept on a deeper level. He would learn that sometimes doing the right thing means making personal sacrifices. This would add a new layer to Naruto's character. He would not only be the loud, determined ninja but also someone who could make tough choices for the greater good, like Itachi did.
Well, first off, Naruto's physical abilities would be on a whole new level. His strength would be enough to lift and throw huge objects with ease, much like the Ghost Rider can. His speed would be enhanced so that he could move faster than the eye can see. In terms of his abilities, the transformation into the Ghost Rider would likely give him new ways to sense enemies. The hellfire would not only be a weapon but also a tool for detection. Naruto's values might also be challenged. He has always been about protecting the weak and bringing peace, but the Ghost Rider's nature of vengeance could conflict with that. However, he could also use the new powers to better protect his village and those he loves. For example, the hellfire could be used to create barriers to protect against attacks, and his newfound strength could be used to defend against powerful enemies that his normal ninja skills might not be able to handle.
Well, if Naruto were Itachi's apprentice in a fanfiction, Naruto would likely gain a whole new set of skills and a different perspective. Itachi is known for his powerful jutsu and strategic mind. Naruto might learn more about genjutsu, which he wasn't really good at. He could also learn Itachi's calm and collected way of handling dangerous situations. This would change Naruto's fighting style a great deal. He might become more stealthy and less reliant on his brute force.
He'd likely become more of an enigma. His friends might find it hard to relate to him as his powers would be so different. He could become more solitary, like a dragon guarding its hoard, but also more powerful and feared.
Naruto's relationship with Sasuke would likely have a new layer of respect. Naruto, having been trained by Itachi, would understand the Uchiha clan more, which is a big part of Sasuke's identity. This could make Sasuke see Naruto in a different light too. Instead of just seeing him as a rival, he might start to view Naruto as someone who is also connected to his family in a way. They could start to communicate better, with Naruto being able to speak more knowledgeably about Sasuke's family and their history.
Well, it could be about Naruto learning Itachi's unique jutsu. For example, Itachi's Sharingan techniques. Naruto might start to understand the Uchiha's way of fighting and incorporate it into his own style, which is mainly based on his Rasengan and shadow clones. It could also involve Naruto learning about Itachi's past and the secrets of the Uchiha clan, which would give him a new perspective on the ninja world.
He might gain a new level of physical control. The lean fighting style requires precise body movements. Naruto, by adapting it, would likely improve his overall body coordination. This could lead to him being able to perform his existing ninja techniques with more accuracy and power. For instance, his Rasengan might become even more devastating as he can position his body better to deliver it. Also, his character could become more self - assured in his fighting abilities as he masters this new style, which in turn could affect his relationships with other characters in the fanfic. They might see him as an even more formidable opponent or a more reliable ally.
His social standing in the village could be different. Since Itachi was a respected and feared figure, Naruto being associated with him could bring both admiration and suspicion. Some might see Naruto as a potential threat because of his connection to Itachi. However, others who knew Itachi's true nature might support Naruto more. Naruto would also have to deal with the legacy of Itachi, which could be both a burden and an inspiration.
His combat abilities would likely be more refined. Female Itachi would train Naruto in precision and stealth, enhancing his skills in close - quarters combat. He might also be better at genjutsu as Itachi was a master of it.
Naruto's character could become more reserved. Since he is in a subservient role as a pet, he might learn to be more patient and observant, like Itachi. His brashness might be toned down as he follows Itachi's lead.
She would gain a new sense of self - reliance. In the Harry Potter books, she had Harry and Ron to rely on. But as a hitwoman in the KHR fanfic, she'd be on her own most of the time. This would force her to trust her own instincts more. She'd have to make quick decisions without the input of others, and this would shape her into a more independent and perhaps even more dangerous character.