Naruto might become more withdrawn. The experiments could make him feel like an outcast, especially if they change his appearance or abilities in a way that makes others fear him. He may lose some of his initial optimism and become more cynical.
Naruto's personality would likely be a complex mix of changes. He might still hold on to some of his core values like loyalty and friendship, but the trauma of the experiments could make him more guarded. He could develop a sense of anger towards Madara and those who allowed the experiments to happen. Additionally, he may become more self - reflective, constantly thinking about his new identity and how he fits into the ninja world now that he has been so drastically altered by Madara's experiments.
His personality could take a darker turn. After being experimented on by Madara, Naruto may start to question his values. He could become more ruthless in his approach to enemies, as he has endured so much pain. He might also become more secretive, not wanting to burden his friends with what he has been through.
He might become more distrustful. After being experimented on, Naruto would have a hard time trusting new people easily. He has always been an open - hearted person, but this experience could make him more guarded.
His confidence might increase even more. Female Madara is a strong figure, and being trained by her would give Naruto a sense of having access to greater power. So he would be more self - assured in his actions.
He'd probably be more serious. Female Madara is a strong and often brooding character. So, Naruto might not be as carefree as in the original. He could be more focused on power and revenge if Madara has influenced him with her own past grudges.
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.
If Naruto was their grandson in fanfiction, his power level would likely skyrocket. He could gain access to the Wood Style more easily, like Hashirama. And he might have a natural understanding of the Sharingan and its powers from Madara. This would change the way he approaches battles and how others view him.
Some of his friends might be a bit more cautious around him. For example, Sasuke might be more on guard, as he has a history with the Uchiha and Madara's power is something he'd be very aware of. But Naruto would still try to keep their friendship intact.
With Kakashi, Naruto's relationship could change a lot. Kakashi has always been a mentor to Naruto. But if Naruto is Madara's grandson, Kakashi might be more cautious. He has a history with the Uchiha and Madara in particular. So, he could be more watchful of Naruto, which might make Naruto feel a bit alienated from his old teacher. At the same time, Kakashi could also see it as an opportunity to guide Naruto in a way that prevents him from going down Madara's dark path.
If Naruto had Madara's memories in fanfiction, his relationships would shift in multiple ways. With his friends, he might seem a bit more distant at first as he tries to process Madara's often - solitary and distrustful view of others. However, he'd also be more protective, using Madara's knowledge of the world's dangers. His relationship with the village elders could become more strained. Since Madara had a negative view of Konoha's leadership at times, Naruto might start to question some of their decisions more, based on those memories.
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.