In fanfiction, if Percy Jackson becomes a primordial, it would be a huge shift in the narrative. He could be involved in the creation or destruction of new worlds. His personality might also change. He could become more detached, like many primordial beings are, as he now views the world from a much higher and more complex perspective. He might have to make decisions that affect the entire fabric of existence, and his actions would have consequences on a universal scale.
If Percy Jackson became a primordial in fanfiction, he would be a force to be reckoned with. Primordials are extremely powerful entities. Percy's transformation could lead to him having the ability to reshape the world according to his will. He could potentially create new realms or change the laws of nature. His personality might also shift, becoming more detached and otherworldly as he adapts to his new primordial state. This would make for a very interesting plot as the other characters try to deal with this new Percy.
Well, he would probably be an amazing soldier. Given his skills from his demigod adventures, like his combat abilities and quick thinking. He could use his sword - Riptide - to great effect. Maybe he'd be part of a special unit in the fanfiction, using his powers to protect his comrades and take on dangerous missions.
Well, it would be really interesting. Percy is used to his own world of Greek gods and demigods. If he became a Cullen, he'd have to adapt to the vampire lifestyle. He'd probably bring his combat skills and his sense of loyalty. Maybe he'd be the one to protect the Cullens in a different way than they're used to. He might also struggle with the whole not - eating - people thing, since he's used to having his own diet in his world.
Well, if Percy becomes a wolf in fanfiction, he would probably have to adapt to a whole new way of life. He'd be part of a wolf pack perhaps. This could lead to some interesting character development as he learns the pack's hierarchy and how to communicate in a more primal way. And his relationship with his friends might change too, as they might be a bit wary of his new wolfish form at first.
If Percy Jackson were to become Lucifer in fanfiction, it could lead to some really interesting storylines. He could use his new Lucifer - like status to rebel against the gods in a different way than he did as Percy. His view of the world would change drastically. For example, he might no longer see the Olympian gods as the ultimate authority. Instead, he could try to create his own order or chaos, depending on how the author interprets the Lucifer character.
If Percy Jackson becomes the Joker in fanfiction, it would be a really wild and unexpected transformation. The story could take a very dark turn. Percy, who is usually a heroic figure, would now have the chaotic and unpredictable nature of the Joker. His friends in the Percy Jackson universe might not recognize him, and he could start causing all sorts of mayhem in both the demigod world and the mortal world. Maybe he'd use his newfound Joker - like insanity to play cruel tricks on his former allies or enemies, blurring the lines between good and evil even more in the fanfiction world.
In some fanfictions, if Percy Jackson becomes Death, he might gain the power to decide the fates of all beings. He could be seen as a very solemn and powerful figure, no longer the carefree demigod. His relationships with other characters would also change drastically. For example, his friends might fear him at first, but then come to understand his new role and the importance of it in the grand scheme of things.
Well, he might gain enhanced physical abilities like super strength, speed, and agility. His senses would also be heightened, which could make him an even more formidable opponent. He'd probably have to deal with the whole moon - influenced transformation thing too, which could be both a curse and an advantage depending on the situation in the fanfiction.
In such a fanfiction, Percy might gain the power to manipulate time. He could go back in time to prevent disasters in the demigod world, like stopping Kronos from rising before. He might also be able to foresee future threats and prepare for them. For example, he could ensure the safety of Camp Half - Blood in advance against any upcoming attacks.
He might have incredible new powers. For example, he could control not only water but also other elements from the pantheon he crosses over with. He could use his new godly status to protect more than just the demigods. Maybe he would be able to create new realms or change the rules of existing ones.