In terms of his relationship with the village as a whole, there would be a lot of mixed feelings. The elders might be both intrigued and fearful of Naruto's new state. They could try to use his powers for the village's benefit but also keep a close eye on him in case he goes out of control. Naruto would have to work hard to prove that he's still on the side of the village, and his relationships would be strained as he tries to balance his old self with the new, Sephiroth - influenced self.
Naruto's relationship with his sensei, like Kakashi, would also change. Kakashi would be extremely vigilant and try to train Naruto to control the Sephiroth - like powers. He might also be researching about this strange phenomenon. As for his friends in the village, some might be afraid of him, while others might see it as an opportunity for the village to become stronger. But overall, Naruto would feel a bit isolated as he's different now.
His relationship with Sasuke would be very different. Sasuke might see Naruto as more of a rival or a threat now that he has Whitebeard's power and influence. Naruto, on the other hand, would probably try to get Sasuke to understand his new purpose of bringing unity. His friends like Sakura and Kakashi would also be a bit in awe at first, but then they would support him as he tries to use his new powers for good.
His personality might become more brooding. Sephiroth has a rather dark and mysterious personality, and some of that could rub off on Naruto. Naruto might start to keep more to himself and not be as open with his emotions as he used to be.
Naruto's character would become more serious. Sephiroth's training is no joke and Naruto would have to focus more. He might lose some of his naivete and become more worldly.
Well, for her relationship with Kakashi, he would be very cautious. He would probably keep a closer eye on her, but also try to guide her in understanding and controlling her new powers. As for her friends in general, some might be scared and distance themselves, while others would be curious and want to learn more about her new identity. It could create a lot of tension and also some new, deeper friendships as they all navigate this strange new situation.
His relationship with Sasuke would likely become more of a partnership. As Hokage, Naruto would need Sasuke's skills and knowledge to protect the village. They would probably have regular meetings to discuss security and other important matters.
Well, first of all, Naruto's usually carefree and positive personality could be tempered with Ace's more complex emotional side. Ace had a lot of baggage related to his family and his identity as a pirate. So Naruto might start to have some internal struggles about his place in the world. He could become more reserved in some ways, like not being as quick to share his feelings. At the same time, his loyalty would become even more intense. He would be willing to go to greater lengths for his friends and the village, almost to the point of self - sacrifice, which was a big part of Ace's character. And his view of power might change too. Instead of just seeing it as a means to protect and be recognized, he could see it as a way to uphold a certain code, like Ace's code among the pirates.
His relationship with Sasuke could be different. Maybe Sasuke would be in awe of Naruto's new powers at first. They might have less of a rivalry and more of a partnership from the start, with Sasuke seeing Naruto as a step ahead in power and knowledge.
In terms of his romantic relationships, if there were any potential love interests, they might be more hesitant. However, Naruto's determination and positive attitude could still win them over. His relationships with his teammates from Team 7 would likely shift. They would need to adjust their battle strategies to account for his one - eyed state. His bond with Hinata could also be tested as she might worry more about his safety and his ability to protect himself and the village.
His relationship with his friends would be strained. For example, Sasuke might notice a change in Naruto's attitude towards him and others. Naruto may start to avoid his friends as he no longer trusts them like he used to.
His relationship with Sakura would be very different. Instead of the one - sided love she had for Sasuke, she might be both attracted and repelled by Naruto's new anti - hero persona. She could see the good in his intentions but be horrified by his methods.