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.
His relationships with his friends would become more complex. His friends might be a bit scared or at least unsure about this new side of him. For example, Sakura might be worried about how to approach him now. Sasuke, on the other hand, might see Naruto in a completely different light, either as a threat or as an even more interesting rival. His relationship with the village elders would also be different. They might try to keep a closer eye on him or even isolate him to some extent.
His relationship with Hinata might be affected. She might be a bit more worried about him at first, but also see him as even more of a hero for having to endure this new transformation. With his friends like Shikamaru and Choji, they might be more cautious around him initially, but still be there to support him. They would have to get used to his new state and the potential danger it could bring.
In terms of his relationship with the other tailed beast hosts, it could become more complex. He might have a new understanding of what they've been through, but at the same time, they could be jealous of his new form. Some might see him as an upstart, while others might look to him for leadership. Naruto would have to navigate these tricky relationships carefully, all while trying to figure out his own new identity as a tailed beast.
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 personality would likely be more subdued. Ebisu is a rather proper and disciplined character, so Naruto would probably be less rambunctious.
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.
If Naruto were to become an angel in fanfiction, his personality would experience a significant transformation. His boisterous nature might be toned down a bit as he takes on a more solemn and wise demeanor. He would still be the kind - hearted Naruto we know, but his understanding of good and evil would be deeper. His compassion would extend not only to his friends and villagers but also to his enemies. He would strive to redeem them rather than simply defeat them, seeing the potential for good in everyone, which is a very angel - like trait. His sense of justice would also be more refined, based on a celestial understanding of right and wrong rather than just the ninja code.
His personality might become more guarded. He'd be surrounded by people who are mostly out for themselves or have very different values from him. So, he'd need to be more cautious in showing his true self.
Naruto's personality would be a blend. He'd keep his core values like loyalty and his love for his friends. However, being in Cell's body, he'd have to adapt. He might become more reserved in some ways because Cell wasn't as open as Naruto. But he'd still find ways to show his Naruto - ness, like when it comes to facing challenges head - on and never giving up. He'd also have to handle the power - hungry side of Cell's nature, but he'd probably try to turn it into a drive to protect rather than conquer.