His competitiveness might also be affected. In a male - dominated world like the demigod world he lives in, as a woman he might have to prove himself even more. This could make him more tenacious and determined, but also more strategic in how he competes. He might not be able to rely on brute strength as much and would have to use his intelligence and charm to get ahead.
His sense of humor could change too. Maybe he would use his new form to play more sly or sarcastic jokes. He could also become more protective, in a different way than before. Instead of the brash, physical protection he used to offer, he might use his newfound understanding of the female perspective to protect in a more subtle, emotional way.
Well, his confidence might shift. As a woman, Percy could be more cautious at first, having to deal with different social expectations. But he could also become more empathetic. Since society often expects women to be more in tune with emotions, Percy might start to pick up on the feelings of others more easily.
His personality would likely become more protective. Since Cerberus is a guardian, Percy might feel an intense need to protect those around him more than ever.
He might become more fierce. As a dragon, he has the physical power to match his temper at times. He could be less patient with those who oppose him.
Her personality change could be influenced by the new experiences she has as a girl. For instance, she could be more fashion - conscious, which might seem superficial at first but could actually lead to a deeper exploration of self - expression. This newfound interest could make her more open - minded to different forms of art and creativity. Additionally, she might develop a more collaborative personality. Instead of always being the lone hero type as a boy, she could start to work more closely with others, especially other female characters, sharing ideas and building stronger relationships.
His relationship with Annabeth would be different. She might have to get used to Percy being a pegasus. There could be some initial awkwardness, but also a deeper understanding as she sees him in a new form.
A great plot twist could be that Percy's transformation into a woman is not just a physical one but also gives her new powers or a different connection to the gods. Maybe she can now communicate with a goddess in a way that male Percy couldn't, and this new connection helps her on her quests in ways that are unexpected and exciting.
In his family relationships, Sally Jackson would be in for a big surprise. She would have to adjust to seeing her son as a daughter. Percy would have to deal with different family expectations as a girl. His relationship with Poseidon would also be different. Poseidon might be confused and perhaps less likely to immediately offer the same kind of support he did when Percy was a boy. And Percy's romantic interests, if any, would have to be re - evaluated. He might find himself attracted to different people or be the object of different types of attraction.
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.
One possibility could be that Percy, as a new god, would have to deal with the complex politics of Olympus. He's always been an outsider, and now he'd be thrust into a world of power plays and ancient rivalries. Maybe he'd try to change some of the archaic rules that the gods have held onto for centuries.
One idea could be that Percy turns into a dragon to fight a powerful sea monster. Since he has his connection to water, as a dragon he could breathe a sort of water - based fire or ice that freezes the water around the monster, trapping it.
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.