His personality could change in several ways. Since the Senbonzakura is a power associated with precision and grace, Naruto might become more focused on details. He may also develop a new sense of pride in his abilities. However, he would still keep his core values of loyalty and friendship. He might use the Senbonzakura to protect his friends in a more refined way, rather than just charging in. This could lead to him being seen as more of a strategic fighter, but he would still be the same Naruto at heart, always ready to stand up for what he believes in.
If Gaara got the Rinnegan in a fanfiction, his personality could change in several ways. He might become more introspective as he tries to understand the nature of this new power. Since the Rinnegan is associated with great power and knowledge, he could start to question his place in the ninja world more deeply. At the same time, he may become more isolated as he tries to master the powers of the Rinnegan, fearing that he could accidentally harm those around him with his new - found abilities. However, his core of kindness and protectiveness towards his village and friends would likely remain, but it might be tempered by his new power - related concerns.
If Naruto were on Team 8 in fanfiction, his personality could develop in several ways. He may become more empathetic as he gets to know his new teammates better. Hinata's shyness might make him more sensitive to others' feelings, and he would try to encourage her more. Also, being around Shino's quiet and methodical nature could make him more reflective. He might start thinking more about the consequences of his actions before acting, which is a big change from his usual impulsive self. He could also become more competitive in a different way, trying to prove himself not just in combat but also in the more specialized skills that Team 8 values, like tracking and espionage.
His character could change in terms of his power usage. With the Venom symbiote, he would have access to different powers like enhanced physical abilities and maybe some new jutsu - like a Venom - style Rasengan. Emotionally, he might struggle more with feelings of isolation as others might be scared of his new form. However, Naruto's never - give - up attitude would still shine through, and he would try to prove that he can control the symbiote and use it for good.
In the wider ninja world, his relationship with other villages would change. Some villages might see him as an even greater threat now that he has the Rinnegan, and might try to form alliances against him. However, Naruto being Naruto, he would use his new power to show that he still has the same kind - hearted goals. He would try to use the Rinnegan to bring about peace even more strongly, and over time, win over those who were initially suspicious.
Well, Naruto's personality would have an interesting transformation. He would likely become more of a risk - taker. The pirate world is full of uncertainties and dangers, and Naruto would embrace this. He might become more laid - back in some ways, enjoying the simple pleasures of life at sea like drinking grog (if they have something similar in this fanfiction world) and singing sea shanties. But at the same time, his competitive nature would still be there. He'd want to prove himself as a great pirate, perhaps competing with other well - known pirates. His naivete might also change a bit. While he was often naive in the ninja world, the harshness of the pirate life would make him more street - smart, yet still retain his positive outlook on life.
Naruto's personality would become more calculating. While he's always been headstrong, as a mafia boss, he'd have to think several steps ahead. He couldn't just rush into things like he did in his ninja days. He'd still be loyal, but that loyalty would be more towards his mafia family. His cheerful and sometimes naive side would probably fade a bit as he'd be dealing with more underhanded and dangerous people. He'd need to be more secretive and not show all his cards at once.
His personality would likely be more subdued. Ebisu is a rather proper and disciplined character, so Naruto would probably be less rambunctious.
He might become more wild and instinctive. Tailed beasts are known for their raw power and basic instincts. So Naruto could be more impulsive, acting on his first thoughts rather than thinking things through. For example, in a fight, he might not hold back as much as he usually does as a normal ninja.
He would probably become more diplomatic. Naruto is already good at making friends, but as a Daimyo, he would need to be more tactful in his interactions with other leaders. He would have to hold his tongue more and think before speaking to avoid international incidents.
His personality could become more calculating. Since Cell is a rather cunning and strategic being, Naruto might start to think more like a tactician. He'd still have his core values of protecting his friends and the village, but he'd approach battles with a different mindset.