His personality could change in several ways. For one, he might become more arrogant due to the association with Zeus. However, he could also become more responsible, realizing that he now represents Zeus in a way. He may also grow more distant from his old friends as he has to adapt to his new life among Zeus' domain, which could be full of more formalities and power plays.
Percy's personality would likely be affected quite a bit. Since Zeus is a very different god from Poseidon, Percy may have to become more strategic and less impulsive. Zeus values power and order, so Percy might start to think more about the long - term consequences of his actions. He could also become more reserved, as the environment around Zeus is often filled with political intrigue. And he may develop a new sense of pride, not just in himself but in his new 'divine family', which could lead to both positive and negative changes in his relationships with others.
Percy might become more charming. Aphrodite is all about love and beauty, and her influence could make Percy more aware of how to present himself in an appealing way. He could start using more flattery and charm in his interactions, which would be a big change from his more straightforward, sometimes brash self.
One possible aspect in this fanfiction could be Percy's struggle with his new identity. As the adopted son of Zeus, he might face challenges in a world where the relationships between gods and their offspring are complex. He could be dealing with the expectations of Zeus, which are likely to be high and different from what he has known before.
Percy's personality could become more adaptable. The Avengers operate in a different world compared to where Percy is from. He'd have to learn new ways of doing things. So, he might become more flexible in his thinking and actions. Also, he could become more serious in some ways, as the Avengers often deal with high - stakes situations.
With his friends at Camp Half - Blood, Percy might become a bit of an outlier. His connection to Zeus through the blessing could make some of his friends who are more closely tied to Poseidon or other gods feel a bit uneasy. However, it could also earn him respect from those who admire Zeus' power. Percy would have to work hard to maintain his friendships while dealing with this new dynamic.
One possible plot twist could be Percy's struggle with his new identity. Since Zeus is the king of the gods, Percy might face a lot of envy and even threats from other demigods or minor gods who see him as having an unfair advantage. Another twist could be Percy's relationship with his old friends at Camp Half - Blood. They might feel betrayed or confused as to why Percy has been adopted by Zeus instead of Poseidon.
A potential plot could be Percy being sent on a special mission by Zeus. This mission might be crucial for the balance of the godly world, and Percy has to prove himself worthy of being Zeus' adopted son. He could face many obstacles and powerful foes during this mission.
In the fanfiction, Percy's relationship with Zeus may develop gradually. Zeus, being a powerful and often aloof figure, might initially be distant from Percy. But as Percy shows his courage and abilities, Zeus could start to take a closer interest. This might lead to Zeus mentoring Percy in some ways, teaching him about godly powers and responsibilities.
Percy's relationship with the male demigods would change significantly. Some might see him as a traitor for joining the Hunters. However, he would also gain new allies among the Hunters themselves. His relationship with Artemis would be that of a mentee and mentor at first, but as time goes on, it could develop into a more family - like bond. And his relationship with the gods would be different too, as he's now under Artemis's protection, which might make some gods view him in a new light.
His relationship with Annabeth would change. She might be a bit jealous at first of Percy's new connection to Hecate. But then she would see how his new powers could be useful. They would have to learn to work together in a new way, with Percy having different abilities to bring to the table. His friendships with other demigods like Grover would also be different. Grover might be a bit in awe of Percy's new magical side. Percy would also have to form new relationships with the followers of Hecate, who might be very different from the demigods he's used to.
When it comes to his relationship with Hera herself, it would be complex. At first, Percy might be resentful or confused about being adopted by her. But as time goes on, he might start to understand her in a way no one else does. Hera could start to see Percy as a true son, and this could lead to a deep, if somewhat unusual, bond between them. Percy would have to balance this new relationship with his existing ones, and it could lead to some really interesting character development and story arcs.