His personality would be a blend. He would have Kakashi's calmness in high - pressure situations. But at the same time, Naruto's exuberance would peek through at times. For instance, when he's around his friends or when he's really passionate about something. He would be more introverted in general but would still show his Naruto - like enthusiasm on certain occasions.
Naruto's love for his friends and his village would translate into a new form in this rebirth. He might see the people in the Dragon Ball universe as his new family and friends. His outgoing and friendly nature could start to break down the walls of fear that Frieza had created. He would be less likely to immediately resort to violence like the old Frieza, instead trying to talk things out first, but still be ready to fight if necessary to protect those he cares about.
He'd probably be more reserved. Kakashi is not as boisterous as some others, so Naruto might pick up on that. For instance, he might not shout as much about becoming Hokage right away.
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.
Naruto might become a bit more reserved at first. Since Tsuna's world is different from Naruto's, he'd have to adapt. But his core of being kind - hearted and determined would remain. He might be more cautious as Tsuna initially isn't as bold as Naruto was in his own world.
He might become more lenient. In the Naruto world, there is a greater emphasis on teamwork and friendship compared to his original world. So, he could gradually soften his strict and solitary ways as he experiences the bonds that the ninjas form.
He might become more outgoing. In the Naruto world, the culture is different from the rather formal and often secluded wizarding world. Harry would be exposed to a more boisterous and open - minded society, so he could become more extroverted and less reserved.
Naruto's training would be more personalized. Instead of the general training he received in the academy, Kakashi would tailor his training to Naruto's strengths and weaknesses. Given Kakashi's knowledge of different ninja arts, he could expose Naruto to elements of different clans' techniques. This would make Naruto a more versatile ninja. Kakashi would also likely push Naruto to think more analytically during combat, rather than relying solely on brute force. This would help Naruto become a more well - rounded and formidable ninja in the long run.
The story would change a great deal. Naruto's presence in Kakashi's generation could mean an earlier end to the Third Great Ninja War. His ability to inspire and his combat skills could turn the tides of battles. For instance, if he was there during the Kannabi Bridge mission, things might have gone very differently. He could have kept Obito from getting crushed and perhaps changed the fates of many.
When Goku is reborn as Naruto, his personality could shift in several ways. His naivete might be toned down a bit as he has to adapt to the more nuanced world of Naruto. He may become more empathetic towards the villagers' plights since Naruto has his own backstory of being an outcast. However, his love for challenges and growth in power would still be there, but now it would be more intertwined with Naruto's goals of protecting the village and achieving peace in the ninja world.
His personality might become more refined. Instead of being the rowdy Naruto we know, he could be more composed and polite due to the influence of the daimyo's court.