Naruto would become more perceptive. The Sharingan gives the ability to see chakra flow and predict movements. So, he'd be better at combat, and his confidence would likely increase. He might start to rely more on his new visual powers rather than just his raw strength and Nine - Tails chakra.
Naruto's strategic thinking would evolve. With the Sharingan, he can analyze situations quicker. In battles at Wave or later, he'd be able to come up with more complex battle plans. He might also start to explore the deeper mysteries of the Sharingan, such as its different forms and abilities, which would lead him on a new path of self - discovery and growth as a ninja.
His relationships could be affected. His friends might view him differently, some with awe and others with suspicion. For example, Sasuke might feel a strange mix of envy and a newfound respect. Naruto would also have to deal with the Uchiha legacy that comes with the Sharingan, which could put a strain on his identity as an Uzumaki.
He may start to distance himself from his friends. Instead of being the overly friendly Naruto, he becomes more reserved. For example, he might not be as quick to join in on group activities or conversations.
After awakening the Sharingan, Naruto may become more perceptive. He starts to notice small details in his surroundings and in people's behavior that he missed before. This helps him in his ninja missions as he can plan better strategies. His confidence also grows as he realizes he has a new and powerful tool at his disposal.
His fighting style would likely change significantly. With the Sharingan, he could copy his opponents' moves more easily. This would make him a more versatile fighter. He could also use the Sharingan's genjutsu - related abilities to outwit his enemies, adding a new dimension to his combat strategy that was not there before.
He could change in terms of his relationships too. His friends might be both in awe and a bit wary of this new power he has. Naruto himself might struggle with the newfound power, as it's not his natural ability. He might become more introverted as he tries to master it privately, not wanting to accidentally harm his friends with this new, potentially dangerous power.
Naruto's character development would likely become more complex. With the Rinnegan and Sharingan, he would have access to a whole new level of power and knowledge. He might become more introspective as he tries to understand and control these powers. His relationships could also change. For example, his friends might view him differently, with a mix of awe and perhaps a bit of wariness due to the potentially overwhelming nature of these powers.
In some fanfictions, Naruto becomes more confident after the Wave Mission. He realizes his own strength and the importance of his friends more deeply. For example, he might be more assertive in battles and decision - making.
Well, in certain fanfictions, Naruto's view of the ninja world as a whole can shift after the Wave arc. He might start to question the traditional ninja values. Since he witnessed the greed and corruption that led to the problems in Wave, he could strive to change the ninja world from within. He may begin to form his own ideas about what it truly means to be a ninja, which could be different from what he was taught at the academy. He could try to promote peace and cooperation more actively, rather than just following orders blindly.
He becomes more confident. Knowing he has this new power from the dojutsu makes him believe more in his abilities to face tough challenges.
When Naruto awakens Mokuton in the Wave fanfiction, his role in the Wave mission is transformed. Mokuton is a powerful and versatile ability. Naruto could use it to camouflage the group by creating a forest - like environment, making it harder for the enemy to find them. He could also use wooden constructs to hold off attackers while the others carry out the main objective of the mission. This new power elevates his status from a novice ninja trying to prove himself to a crucial part of the mission's success.
In some fanfictions, Sakura might become more confident after the Wave mission. She realizes the harshness of the ninja world and starts to train harder, not just relying on her teammates. For example, she could be seen spending more time in the hospital, learning advanced medical ninjutsu to be more useful in future battles.