Naruto would become more cunning. Orochimaru is a very sly character, and his training would likely rub off on Naruto. Naruto would no longer be as straightforward in his battles and interactions. He might start to think several steps ahead, like Orochimaru does.
His view of the ninja world could change. Orochimaru has a very different view of the ninja world compared to Naruto. Naruto, who has always been about friendship and protecting the village, might start to question some of the more traditional ninja values. He could become more cynical, seeing the world as a place full of power - hungry individuals like Orochimaru. However, he would also be more aware of the darker aspects of the ninja world that he might not have fully understood before. This new - found knowledge could make him more cautious in his future dealings with other ninja.
Naruto's character would likely become more cynical. Orochimaru's ways are full of deceit and self - gain, and Naruto, being around that, would start to question the ideals he once held. His usually bright and optimistic personality might be clouded with a sense of distrust and a more cut - throat attitude.
Naruto would likely become more secretive. Since Orochimaru's training methods are often not in line with Konoha's values, Naruto would have to hide what he's learning. He might also become more distrustful of others as Orochimaru could instill in him the idea that everyone is out to get him for his newfound power.
Naruto's morality could be somewhat skewed. Orochimaru has a very different view on right and wrong compared to Naruto. So, Naruto might start to question some of his previous beliefs. For example, he might be more willing to use dangerous or forbidden jutsus if it means achieving his goals. He'd also probably be more distrustful of others, as Orochimaru always has ulterior motives. This would be a big change from the Naruto who was always so quick to trust and befriend people.
Naruto's character would change a great deal. He would be exposed to Orochimaru's world of experimentation and dark magic. This might make him more cynical about the ninja world. Also, he would have to adapt to Orochimaru's strict and often cruel training methods. As a result, he could become more introverted and less trusting of others. His once open - hearted nature might be replaced with a more guarded one.
Naruto would probably become more serious. Shisui was a serious - minded ninja. His training might make Naruto less impulsive and more calculated in his actions.
Naruto would likely become more secretive. Since Orochimaru is a very private and often devious character, Naruto might pick up some of those traits. He would probably keep things from his friends more often.
He'd be more cynical. Orochimaru's ways would make Naruto question the goodness in people.
If trained by Orochimaru, Harry's magic could change in several ways. Firstly, he might develop a more aggressive and offensive style of magic, as Orochimaru is often focused on power and combat. Secondly, he could start using magic in a more self - serving way, rather than for the good of others as he was taught at Hogwarts. And finally, his connection with magical creatures might change, especially if Orochimaru introduced him to some of the more dangerous and exotic creatures in his world. Harry's magic would no longer be the pure and somewhat naive magic he had before, but a more complex and potentially dangerous form of magic.
Naruto would likely become more stealthy. Itachi is known for his stealth and if he trains Naruto, Naruto would pick up some of those skills. He might start to rely less on his brash and straightforward fighting style and incorporate more subtlety.
Naruto would likely become more serious. Madara's influence would probably make him less impulsive. For instance, he would think twice before charging into battle without a proper plan.