His relationship with Kakashi could also be different. Kakashi would need to train Naruto in a different way to help him control and utilize his devil fruit powers effectively. He might be more cautious about sending Naruto on dangerous missions until he is sure that Naruto can handle his new abilities without putting himself and others at risk.
His relationship with Sasuke might change. Sasuke is used to Naruto's regular abilities. But if Naruto had devil fruit powers, Sasuke might view him as an even greater rival or, in some cases, a potential threat. He could also be more intrigued by Naruto's new powers and be more likely to team up with him to face stronger enemies.
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.
If Naruto ate a devil fruit, he would gain some amazing new powers. For example, if it was a Logia type like the Mera Mera no Mi, he could turn into fire and use fire - based attacks in addition to his existing ninja skills. This would make him even more formidable in battles.
His character would become more powerful. The devil fruit power would add a new dimension to him.
It might make his crew members view him in a new light. They could be in awe of his new dragon - like powers and be more protective of him as they know he has a very powerful and perhaps more dangerous ability now. For example, Nami might be more cautious about Luffy getting into fights as his dragon powers could attract more powerful enemies.
His relationship with Sasuke would become very strained. Usually, they have a complex bond based on rivalry and friendship, but as an emotionless killer, Naruto would see Sasuke more as a target or an obstacle. He wouldn't care about Sasuke's own goals or feelings.
For his friends in Konoha, they would initially be shocked. Some might be afraid that Naruto's half - god status would make him too different from them. However, characters like Shikamaru would likely see the potential in Naruto's powers and try to use it to Konoha's advantage. His relationship with Kakashi would also change, as Kakashi would have to guide Naruto in a whole new way, teaching him how to use his powers without losing his humanity.
His relationship with Sasuke would likely become very strained. Sasuke, who has his own dark path, might still see Naruto's new Jashinist ways as too extreme. With Sakura, she would probably be very disappointed and try to convince Naruto to return to his old self. As for Kakashi, he would be deeply concerned and might even see Naruto as a potential threat to the village at first.
His relationship with Sasuke would likely become more of a partnership. They would work together to protect the village and the ninja world. With Sakura, Naruto might become more of a respected leader figure, and she could be one of his most trusted medical ninjas. And for Kakashi, Naruto would now be his equal in terms of leadership, and they would probably exchange ideas on how to better lead the village.
His relationship with Sasuke would likely be different. With Naruto being a sage from birth, Sasuke might see him as an even greater rival or, perhaps, someone to look up to more. Naruto could use his sage - like wisdom to better understand Sasuke's pain and motives, and might be more effective in bringing Sasuke back to the village earlier.
With Kakashi, Naruto's lack of emotions would mean he no longer has the same student - teacher bond. Kakashi is used to Naruto's determination and exuberance. Without emotions, Naruto would be like a different person. He'd follow Kakashi's orders mechanically without the usual eagerness and the relationship would become more of a cold, professional one.