Well, Percy already has his own set of powers related to water and being a demigod. But if trained by Kratos, he'd likely become a more well - rounded fighter. Kratos could teach him about different combat strategies and how to use his environment to his advantage, not just relying on his powers. Percy might also develop a more intimidating presence, like Kratos, which could be useful when facing enemies in the fanfiction world.
In this fanfiction, it could be that Harry Potter, under Kratos' training, would develop a whole new set of magical abilities. Kratos' Spartan training methods might be applied to magic. For example, Harry could learn to use his magic in a more instinctive and immediate way, like how Kratos wields his weapons. Also, Harry's view on good and evil could be influenced by Kratos' own complex moral code.
It's hard to say for sure without reading the fanfiction. But it could be the usual suspects like Voldemort and his Death Eaters. However, with Kratos in the picture, there might be new antagonists from Kratos' world who see Harry as a threat now that he's being trained by such a powerful being.
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.
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.
His powers could become more focused. Kratos might teach him to use his water powers in a more precise way, like creating sharp water blades instead of just large waves.
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.
There might be a fanfiction where Naruto somehow gets transported to Kratos' realm. Naruto, with his never - give - up attitude, could try to befriend Kratos. He might see the pain and anger in Kratos and try to show him a different way. And they could team up against some common enemies in Kratos' world, like some of the gods or demons there.
If Naruto were Kratos' son in a fanfiction, the story could go in many directions. Naruto might have a different view on power. Instead of seeking recognition like he did in the original story, he could be more focused on using his power to right wrongs in a more forceful way. His relationships would also change. For example, his bond with Sasuke could be more of a rivalry based on power, similar to how Kratos has his own rivalries. And his training would be a combination of ninja training and whatever training Kratos would give his son, which might involve more physical and mental endurance challenges.
Well, Naruto would probably gain some really unique magical abilities. Fairy Tail mages are known for their diverse magic, and Naruto could combine his chakra skills with something like Fire Magic or Celestial Magic. He might become even more powerful in combat, with new ways to attack and defend.