Who are the main antagonists in the God of War 1 to 3 story?

It could be the traditional God of War villains like the gods who oppose Izuku. Maybe Ares, if he's still around in the fanfiction's version of the God of War world, would see Izuku as a threat and try to stop him.

There could be an ancient evil force that awakens because of Luffy's new powers. This force was once sealed away but now wants to destroy Luffy and everything he stands for, seeing him as a disruption to the balance it once knew.

Perhaps there are demons or dark forces that are trying to disrupt the union between Bella and the God of War. These antagonists could be bent on causing chaos and destruction in their world, seeing their relationship as a symbol of hope that they want to destroy.

Another possible antagonist could be some of the more bloodthirsty and power - hungry warlords or demons in the God of War universe. They might not care about Percy's origin or his powers, but simply see him as someone to be defeated or enslaved. These types of characters are often driven by pure greed and a desire for chaos, which would put them directly in Percy's path.

It could be a new group of ninjas who oppose Naruto's new - found power as the 'god of blades'. They might be jealous or see him as a threat to their own power - hungry plans.

In some fanfictions, there could be a group of rogue ninjas who form an alliance during the war. They have no loyalty to any particular side and are only interested in causing mayhem. Sasuke and Sakura would have to deal with their unpredictable attacks and devious plans.

The main characters in God of War 4 story are Kratos and his son Atreus.

Perhaps the very magic that made Harry a god has a sort of negative side - effect. This could manifest as a shadowy entity within Harry that tries to take over his mind and use his powers for evil. So, in a way, this internal struggle could be the main antagonist in the story.

The old - fashioned and conservative gods who don't like the idea of a new, young god like Percy shaking up their established order could be antagonists. They might see him as a threat to their power and try to undermine him.

In this kind of fanfiction, the Titans could also be antagonists. They might want to use Percy's power over time to their advantage. Maybe they think they can rewrite history in a way that would bring them back to power. Kronos, in particular, if he were somehow still a threat, could be a major adversary. He could try to manipulate Percy into using his time powers in a way that would benefit the Titans, like going back and changing events that led to their downfall.