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.
In some fanfictions, Naruto might become more strategic during the Wave arc. He could learn from his mistakes faster and start to think several steps ahead in battles, instead of just charging in blindly like he sometimes does in the original story.
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.
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.
It might be related to a connection with some powerful entity in the Wave arc. For example, if there's a secret shinobi from the past whose power is tied to the Rinnegan and Naruto somehow forms a bond with that power source, it could lead to the awakening. Also, the intense emotions and challenges he faces in the Wave arc might be a catalyst, pushing his chakra to a new level and awakening the Rinnegan.
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.
He could become more empathetic. After seeing the suffering in Wave, Naruto might be more in tune with the pain of others. So when he meets people in similar situations later, he can better understand their feelings.
For Sakura, she would be worried sick. She might start to question her own strength and ability to protect her friends. And she may also try to find Naruto herself.
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.
Well, Naruto being the daimyo could bring a lot of positive changes. He might start by reforming the military system. Since he has his own ninja skills and experiences, he could train the local forces better. Also, he'd probably focus on improving the economy. For example, he could use his influence to get more trade deals with other countries. And in terms of society, he'd promote equality among all the people in Wave Country, regardless of their social status or origin.
The dynamic between the characters would be completely different. Without Naruto, Sasuke would lack his main rival within the team. Their growth as characters might be stunted as they wouldn't have that constant push from Naruto. Also, Sakura would be missing an important friend and source of motivation.