Well, Naruto's character development can be quite different. In the normal story, he had to learn things the hard way through many battles and losses. But going back in time, he has the advantage of hindsight. He might become more of a mentor figure to his younger self. He could also be more confident in his abilities right from the start because he knows what he's capable of achieving in the future. He may also be more diplomatic in handling village politics as he's aware of the consequences of bad decisions from his own time. His relationships with his peers, like Sakura and Kakashi, could also change as he takes on a more proactive role in their interactions.
Well, Naruto would be more confident. Since he has the knowledge of the future, he knows what mistakes to avoid and how to handle situations better. For instance, he won't make the same naive mistakes when dealing with his enemies or friends.
Naruto's character could develop in many different ways. If he travels to the past, he'd have to adapt to the different ways of the old ninja world. He might become more respectful of the traditions as he sees how they were formed. Also, he could become more of a mentor figure to the younger versions of his friends, which would change his self - perception from a student to a teacher, thus making him more mature and responsible.
He would gain a deeper understanding of the history and the people around him. By experiencing the past first - hand, Naruto could see the motives and the struggles of the older generations. This would make him more empathetic towards characters like Itachi. He would realize that there were many hidden factors behind their actions, and this new - found understanding could shape his character into a more mature and complex individual. His relationships with his friends and allies would also be affected as he could share this new knowledge with them.
Naruto might develop a more cynical view of the world at first. Since Obito is involved in his 'founding', there could be darker elements in his upbringing. He may start off being more distrustful of others. However, as he discovers the truth about Obito's actions, he could use that knowledge to grow into a more complex and empathetic character, different from the naive but positive Naruto in the original story.
He might be more confident earlier. Since the Namikaze bloodline is associated with great power, Naruto could have a different outlook on his abilities from the start. He may not be as much of an underdog.
He could also develop a deeper understanding of the history and roots of the Hidden Leaf. By being in the past, he gets to experience the events that shaped the village first - hand. This makes him more empathetic towards the founders and previous generations, and he might bring back a new sense of pride and respect for the village's heritage when he returns to his own time. Well, in some fanfictions, he might also struggle with the idea of changing the past too much. He has to balance his desire to make things better with the potential consequences of altering history, which adds a layer of moral complexity to his character development.
In a fanfiction where Naruto is in the Akatsuki, his character would grow in terms of understanding different perspectives. He'd interact with characters who have very different backgrounds and motives from his friends in Konoha. His sense of loyalty would be tested as he'd be in a group that is generally considered the enemy. This could lead to him becoming more independent in his decision - making, rather than relying on the approval of his village. He might also become more calculating, as the Akatsuki often have to plan their moves carefully to avoid detection and achieve their goals.
His relationships with his peers would be different. For example, if he was adopted into a well - respected shinobi family, some characters who looked down on him before might treat him with more respect, and this would impact how he interacts with them. He might be less likely to seek attention through pranks.
Naruto's character might become more conflicted. His usual positive and straightforward view of the world could be challenged. He might start to question his own ninja way more often, as Pein's extreme methods would force him to re - evaluate his beliefs about how to achieve peace.
Naruto's personality would likely be more introverted. Instead of seeking constant attention and approval from the village, he might find solace in the company of the Kitsune and the natural world around him. His sense of justice could also be more complex. He might not simply see things in terms of good and bad as he did in the original story. For example, he could understand that some enemies might have reasons for their actions due to his Kitsune - given wisdom. His relationships with others would also be different, as he would approach people with a more cautious and observant eye, having learned from the Kitsune's solitary yet perceptive nature.