He might become more cautious. As a bounty hunter, one wrong move could cost him his life. So, he would be less reckless than he was as a ninja in some battles. But his core of being kind and believing in second chances would still be there.
His sense of justice could become more nuanced. As a ninja, he was mostly following the orders of the village. But as a bounty hunter, he has to decide for himself who is truly guilty and who might be a victim of circumstance. This would make him more introspective. He would also be more patient, as bounty hunting often requires waiting for the right moment to strike, rather than charging into battle immediately like he sometimes did as a ninja.
If Naruto becomes involved with Slenderman in a fanfiction, his usually cheerful and determined personality might become darker. He could be more withdrawn as he grapples with the strange and often terrifying aspects of Slenderman's world.
Naruto might become a bit more reserved. Since Ulquiorra is a rather cold and stoic character, Naruto could start to hold back his more exuberant emotions. He might also become more analytical, like Ulquiorra, when it comes to combat situations. Instead of charging in head - first all the time, he'd think more about the best approach.
Naruto's always been this energetic and positive guy. But if he becomes Caius Ballad, he might become more brooding. Caius Ballad has a different kind of vibe, more serious and intense. Naruto's cheerfulness might be toned down a bit, and he could become more focused on achieving specific goals rather than just his general idea of becoming Hokage.
If Naruto becomes like Kenpachi, his personality would become more rough and wild. He would be more direct in combat and less likely to hold back. He might also lose some of his optimistic charm in the process, becoming more of a battle - hungry brute.
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.
If Naruto becomes a Hunter Nin in fanfiction, his personality would change significantly. He'd be more calculating. His usual impulsive nature would have to be toned down because one wrong move as a Hunter Nin could mean disaster. He might also become more solitary, used to working alone in the shadows rather than in a team. His sense of humor might also be more subdued as he takes on this serious and dangerous role.
His personality might become more cautious. Since he has a greater responsibility as a guardian, he can't be as reckless as he was sometimes in the original Naruto series.
His personality might become more withdrawn. As a lich, Naruto could be feared by others, and this might make him more hesitant to interact with people. He was always so outgoing before, but now he might keep to himself more.
Naruto may also become more solitary. Sparda often fought alone, and Naruto, influenced by this, might start to distance himself from his friends at first. However, he would still have that underlying loyalty and would eventually find a way to balance his new - found independence with his relationships.
His confidence would skyrocket. Gilgamesh is extremely self - assured, and Naruto, if influenced by him, would become even more so. He'd be more outspoken about his own abilities and less likely to doubt himself in tough situations.