His confidence would likely soar. As a god, he'd know he has more power and capabilities. So he might be more assertive in his actions and decisions.
If Percy becomes a god in a fanfic, his personality would change in many ways. He'd have to deal with new emotions related to his divinity. He might become more patient because he has an eternity ahead of him. At the same time, he could become more prideful as he now has godly status. But his fundamental goodness would still be there. He might use his new powers and status to be more of a mentor to young demigods, showing a more nurturing side that was always there but now enhanced by his godly nature.
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.
Percy's personality would likely shift in several ways. He'd be more cautious in his actions as his decisions would have far - reaching consequences. His sense of humor might change too. Instead of the light - hearted quips he used to make, he might use more sarcasm or dry humor befitting a god. And his loyalty, which was always a big part of his character, might be tested as he has to balance his new divine duties with his relationships with his old friends. He may become more calculating in how he shows his loyalty, making sure it doesn't conflict with his new role as a god.
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.
He might become more brooding. The Ghost Rider's power comes with a lot of darkness, and Percy, while used to challenges, would have to deal with this new, darker side. He'd still be brave, but it could be a more intense, almost reckless kind of bravery.
If Percy Jackson becomes a god in a crossover fanfiction, his character would experience a significant transformation. He has always been a hero who fought for the underdog. But as a god, he might have to make difficult decisions that could go against his old principles. His view of right and wrong could become more nuanced. He would also have to deal with the envy and fear of those around him. His mortality - which was a big part of his identity - would be gone, and he'd have to redefine himself in the context of immortality. His sense of time would change, and he might start seeing things from a much longer - term perspective. All these changes would make his character much more complex and different from the Percy we knew as a demigod.
His sense of humor might change too. Maybe he would use his mutant powers in funny ways to make light of the situation. For example, if he has water - based powers, he could make little water sculptures of his friends or create water fountains in unexpected places just to make people laugh. This would be a new side of his personality that combines his mutant abilities with his fun - loving nature.