His relationship with Sasuke would likely be affected. With the new powers from the Light - Light Fruit, Naruto might be seen as a greater threat by Sasuke, or Sasuke could be intrigued and want to learn more about the fruit's powers. Naruto's friends in Konoha would also view him differently. They would be both amazed and a little bit cautious as his powers would be very different from what they're used to.
Well, Naruto's chakra control would have to adapt. In the Dying Light world, he might use his chakra to enhance his weapons, like making a kunai cut through the tough zombie hides more easily. His Rasengan could also be modified. Instead of just being a powerful close - range attack, he could potentially throw it like a grenade in the Dying Light environment, causing a lot of damage to groups of zombies. And his sensing ability, which he uses to detect enemies in his own world, could be used to sense the approaching zombie hordes from a distance.
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.
In this fanfiction, Naruto's relationships would experience significant shifts. With his friends, they would initially be curious and a bit envious of his new power. However, as time goes on, they would learn to work with it. His relationship with the village elders might change too. They would likely be more cautious about Naruto, fearing the potential destruction that could come with his new, powerful ability. But Naruto, being Naruto, would strive to prove that he can use the Flame - Flame Fruit's power for the good of the village and its people, thus gradually earning their trust back and strengthening his bonds with them in the process.
The ninja world could change a great deal. If Naruto abandons a devil fruit, and it falls into the wrong hands, like say Orochimaru's, he could use it to create even more powerful and terrifying jutsu. This would force the other ninja villages to band together against this new threat. Also, the concept of power in the Naruto world would be redefined as devil fruit powers are so different from chakra - based abilities.
Naruto might become more cautious. Since the Magma Fruit gives him a very powerful and potentially dangerous ability, he would need to be more careful not to accidentally harm his friends or innocent people. So his usual carefree and impulsive nature could be toned down a bit.
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.
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.