His character might become more aloof. As a primordial god, he would be far removed from the normal world of demigods. He'd likely have a different perspective on things like friendship and loyalty. For example, he might not be as quick to jump into a fight for his friends as he used to be, because his new status would bring a different set of responsibilities.
Percy might struggle with his new identity. He has been a demigod for so long, and suddenly becoming a primordial god means he has to re - evaluate his place in the world. He may miss his old life, his friends, and the simplicity of being a demigod. Adjusting to the new powers and responsibilities is not going to be easy.
In this 'percy becomes a primordial fanfiction', the plot could involve Percy being thrust into a world where the rules of the original story no longer apply. As a primordial, he could have the ability to shape reality. He may start to question his own identity and purpose, and there could be a battle for control over his new powers between different factions.
Obviously Percy is the main character. There could also be other characters from the original series, like Annabeth. She might be worried about Percy's transformation and try to help him adjust. And maybe some of the gods would also be involved, either trying to control Percy or use his new powers for their own ends.
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.
His old friends from Camp Half - Blood like Annabeth could be his allies. She would support him through the transition of becoming a god. Grover too, as his long - time friend, would be there for him. Also, some of the minor gods who have always been on good terms with Percy, like Hestia, might offer their help and guidance as he steps into his new role as a god.
In this type of fanfiction, it could be a really interesting concept. Percy becoming a god already changes the whole dynamic of the Percy Jackson universe. And marrying Artemis, who is a virgin goddess in the original mythology, would be a huge deviation. It might lead to a story full of challenges as they have to deal with the reactions of other gods and goddesses. Maybe Percy's new - found godly powers would help him navigate the complex relationship with Artemis, who is known for her independence.
One idea could be that Percy, as a god, has a child with a mortal. The child might inherit some of Percy's powers but also face the challenges of being a demigod in a modern world. Maybe the story could focus on how Percy tries to protect his child from the various threats that come with being part of the godly world while also teaching the child to embrace their powers.
One possible plot could be Percy facing an ultimate battle that forces the Olympians to recognize his extraordinary powers. They then decide to make him a god as a reward and for the greater good of the pantheon. He might have to give up some of his mortal ties, like his relationship with Annabeth, which would create a great internal conflict for him.
In this type of fanfiction, it's a really interesting concept. One possible scenario could be that Percy's death is a heroic sacrifice. Maybe he gives his life to save the world from an even greater threat than before. And when he becomes a god, he might use his new powers to bring about a new era of peace among the gods and demigods. His transformation could also mean changes in his relationships. For example, his friends might now have to view him in a different light, as a divine being rather than just a fellow demigod.