His friends might be a bit in awe at first. They are used to Naruto's ninja skills, but a Devil Fruit power would be something entirely new. They could also be a bit jealous, but mostly they would be excited to see how Naruto uses this new power in their adventures together.
Well, his friends would initially be very curious. They would want to understand how this new power works. Some of his more cautious friends might worry that the Devil Fruit power could change Naruto in a negative way. But overall, they would support him in learning to master it. Naruto would also be able to protect them in new and more powerful ways, which would strengthen their bond. For example, if he had a water - based Logia fruit, he could use it to rescue his friends from fire - based attacks more effectively than before.
In a Konoha fanfiction where Naruto has a Logia Devil Fruit, he could have amazing new powers. For example, if it was a fire - based Logia fruit, his Fire Style jutsu could be enhanced to a whole new level. He might be able to transform his body into fire completely, making it difficult for enemies to land a hit on him. Also, this new power could change the power dynamics in Konoha, as he would be even more formidable against threats both inside and outside the village.
It might actually strengthen his relationships in some ways. His friends could see him as an even more powerful ally. Naruto, with these new powers, could protect them better. Sakura, for instance, would feel safer around him and this could lead to a deeper bond of trust between them.
Naruto's relationship with his teachers could be different too. Kakashi, for example, would need to adjust his training methods for Naruto. He would have to help Naruto master the Byakugan while still maintaining his existing skills. And Naruto might also have new interactions with other powerful ninjas in the village or from other villages, as they are curious or intimidated by his new - found Byakugan - related abilities.
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.
Well, if Naruto had a Logia Devil Fruit, it would completely change his power set. He could become intangible like most Logia users. For example, he could turn into an element and avoid attacks easily. His combat style would be more about strategic use of his new intangible form rather than just relying on his ninja skills.
Well, if Naruto ate a Logia Devil Fruit in fanfiction, he would likely gain some amazing new powers. Logia fruits often give the ability to transform into an element. Naruto could potentially combine his existing ninja skills with the power of the Logia fruit. For example, if it was a fire - based Logia fruit, he could use his Rasengan and infuse it with the power of fire from the fruit, making it an even more powerful attack.
It could change his relationship with his enemies too. Enemies might be more hesitant to attack him, not knowing what the mouths on his hands can do. Some might be so freaked out that they avoid him altogether. His relationships with his sensei, like Jiraiya, would be interesting. Jiraiya would likely be excited to study this new phenomenon and help Naruto figure out how to use it to his advantage. And Naruto's new 'hand - mouths' could also bring him closer to some characters who are interested in the strange and unusual in the ninja world.
With his friends like Sakura and Kakashi, they would be very curious. Sakura might try to study Naruto's Pokemon bloodline to understand how it works. Kakashi, on the other hand, would be more focused on how to train Naruto to control these new powers. It could bring them closer as they all try to figure out the implications of this new development in Naruto's abilities.
It would likely make his relationship with Iruka even more important. Iruka was one of the first to show Naruto kindness, and with his parents' absence, he would cling to Iruka as a father figure even more. Naruto might also be more eager to prove himself to his peers. He would want to show that he doesn't need his parents and can be just as good or better than those with a normal family. This could lead to some over - competitiveness at times.
Naruto's personality might become more confident. Having the power of a Logia devil fruit would make him feel even more capable in battles. He might be a bit more reckless too, as he tests out his new powers.