If Naruto gains the abilities of Kratos in fanfiction, he would become extremely powerful. Naruto already has his own set of powerful jutsu, but with Kratos' abilities like superhuman strength, enhanced combat skills, and his rage - fueled power, Naruto could defeat almost any enemy with ease. He might be able to take on stronger foes like Kaguya even more effortlessly and protect the Hidden Leaf Village in a much more dominant way.
Naruto might gain superhuman strength like Kratos. He could easily break through solid rock or lift extremely heavy objects. His speed could also increase, allowing him to move so fast that enemies can barely see him. Maybe he could also have the ability to summon the blades of chaos, which he could use in combat in a unique way, like combining them with his kunai.
With the Rinnegan, Naruto might gain the power of the Human Path. This would allow him to read minds or rip out souls, which is a very dark and powerful ability that would be quite different from his usual positive - natured powers.
When Naruto gains the abilities of Kratos in fanfiction, his story would transform in multiple ways. Firstly, in terms of combat, he would be able to handle battles in a completely new way. His fights would be more brutal and efficient. In the plot, he could take on larger - scale threats much earlier. For instance, if Akatsuki were to target him earlier, he could fend them off more easily. His character development would also shift. He might become more self - reliant as Kratos' abilities are very individual - centric. However, he would still have his Naruto - like spirit, so he would try to use these powers for the sake of his friends and the village. This would create a new dynamic in his relationships with characters like Sasuke, as he would be in a much stronger position both power - wise and in terms of his self - confidence.
Kakashi would be intrigued. He'd probably study Naruto more closely to see how this new influence affects his growth as a ninja. He might also try to find ways to help Naruto blend Kratos - inspired skills with his existing ninja abilities. Kakashi would be open - minded about it, knowing that new sources of inspiration can lead to great power.
Well, he might gain enhanced wind - style attacks. Since Kumai could potentially be a tool to focus and direct chakra, Naruto could use it to create more precise and powerful gusts of wind, similar to how he uses his regular wind - style jutsu but with added finesse.
They could do strength training together. Kratos could teach Naruto some of his combat techniques that rely on pure physical power. Naruto could in turn show Kratos how to use chakra for things like enhanced speed and agility. They might also practice fighting against each other's typical enemies in simulations.
In some fanfictions, Edward Elric might gain the ability to manipulate time. This could be a really cool addition as it would allow him to go back and correct mistakes he made in his past, like the failed human transmutation that cost him his arm and leg.
It could be a story where Naruto, inspired by Kratos' strength and tenacity, decides to train in a similar way. Maybe he takes on some of Kratos' combat styles and uses them in the Naruto universe, like using his chains to grapple enemies just like Kratos' Blades of Chaos.