He might become more cunning. Just like a fox, he would be able to outwit his enemies more easily. He could use trickery and deception in battles, setting traps for his opponents.
His confidence could reach new heights. As a fox sage, he has new powers and knowledge. This would make him believe more in himself. He might become a bit more mysterious to those around him too. His actions would be less predictable as he starts to think and act more like a fox sage, with a mix of wisdom and wildness.
Naruto could become more solitary. Foxes are often seen as lone creatures. So, he might start to distance himself from his friends a bit, preferring to handle things on his own. But he would still have a strong sense of loyalty deep down. He just might not show it as openly as before.
His personality could become more patient. The process of becoming a sage often involves a lot of waiting, observing, and learning from nature. Naruto, who used to be quick to jump into action, might learn to slow down. He could also become more empathetic as he connects with the natural world and the energy around him. This newfound empathy could change how he interacts with his enemies and friends alike. He might try to understand their motives more instead of just fighting them head - on.
Naruto might become more calculating. Since Mewtwo is very intelligent and has powerful psychic abilities, Naruto would have to use his mind more. He would think before acting, unlike his impulsive self in the original series. This change could make him a better strategist in battles, but it could also lead to misunderstandings with his friends who are used to his more straightforward and impulsive nature.
Naruto's personality could shift towards being more reserved. As a Shinigami, he has to deal with the weight of handling souls and the concept of death. This could make him think twice before acting impulsively like he used to. He may also develop a more empathetic side towards those who are about to die or have lost loved ones, as he now has a closer connection to the afterlife.
He becomes more decisive. As a leader, Naruto can't afford to be indecisive like he sometimes was in his youth. He has to quickly make choices that affect the whole village or group he's leading.
He might become more patient. As a dad, he has to deal with his kids' tantrums and mistakes, so patience is key.
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.
In this fanfiction, Naruto could turn ruthless in terms of his relationships too. He might cut off ties with those he used to consider friends if he feels they are holding him back. His once warm and friendly attitude towards others could be replaced with a more calculating and self - centered one. He may start using people to achieve his goals rather than working together as he did before.
Naruto might become more withdrawn like Gaara was initially. Gaara was isolated due to his power and the fear others had of him. So Naruto could start to keep to himself more, losing some of his boisterous and friendly nature.
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.
His personality might become more aggressive. The demon nature could bring out his primal instincts, making him less patient and more prone to anger.