His personality would likely experience a shift towards a more solemn and responsible demeanor. With godly powers come great responsibilities. Percy would no longer be able to act as carelessly as he did as a demigod. He might become more reserved in showing his emotions, especially as he realizes that his actions as a god can have far - reaching consequences. Also, his loyalty might be tested as he has to balance his new divine status with his relationships from his mortal days.
When Percy is made a god in fanfiction, his personality could shift towards being more authoritative. He has to deal with other gods and manage his own domain. So he might become less impulsive as he now has more at stake. His kindness towards mortals could either increase as he has more power to protect them, or decrease as he becomes more involved in godly affairs. His confidence would likely soar, but it could also turn into arrogance if he's not careful.
Well, he might face the challenge of leaving his mortal life behind. His relationships with his friends and family could be strained. He'd have to deal with new powers that are probably overwhelming at first. And he'd have to adapt to the politics and rules of the godly world which are likely very different from what he's used to.
He might become more aloof. Being a god often comes with a sense of superiority, but Percy has always been down - to - earth. However, his new status could make him a bit more distant from his mortal friends at first. But deep down, he'd still be the same Percy with a strong sense of right and wrong.
Well, initially, Percy might be really confused about his new personality. He's used to being a scrappy demigod. But as a god, he could become more calculating. He'd have to think about the long - term consequences of his actions more. His loyalty to his friends might be tested as he has to consider the greater good of the world. He might also become more secretive as he has to deal with godly secrets and politics. He would still have his core of kindness, but it might be overshadowed at times by his new godly traits.
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.
Maybe in the fanfiction, Percy is tricked into becoming a god. A powerful enemy disguises as a friend and makes Percy perform a ritual that he thinks is for saving his friends but actually turns him into a god. Percy then has to deal with new powers he doesn't fully understand and the betrayal of those who deceived him.
He might become more war - like. Norse gods are often associated with battle, so Percy could lose some of his more laid - back Greek side.
His sense of humor might change. He could become more wry and god - like in his jokes. Also, he might be more decisive, as a god has to make big decisions quickly. However, his love for his friends and family would still be there, just expressed in a different way perhaps, more like a distant protector.
His sense of humor might change. While Percy had a very down - to - earth and sarcastic humor as a mortal, as a god, he might develop a more refined and sometimes cutting sense of humor. He could use it to put other gods in their place or to make a point during a council meeting. Also, he would likely become more confident, bordering on arrogance at times. His new powers and status would give him a boost in self - assurance, but his friends from his mortal days would probably be the ones to keep him in check and remind him not to get too full of himself.
His sense of humor might change. While he was always quick - witted as a demigod, as a god, his humor could become more refined or perhaps more sarcastic in a way that only the other gods would understand. He'd be around different company, and that would influence how he expresses himself. Also, he could become more confident, bordering on arrogant, as he has so much power at his disposal now. But at the same time, his core values of loyalty and protecting the weak might still remain, just expressed in different ways.