His relationship with Annabeth would definitely be affected. She might be a bit wary at first, since Nyx is such an unknown and powerful entity. But she would also be there to support Percy as he figures things out.
In terms of his enemies, they would likely be more fearful or more determined to take him down. His new status as the brother of Nyx gives him a certain level of power and influence that they can't ignore. Percy would also have to re - evaluate his relationships with the minor gods and spirits. They might approach him differently now, either seeking his favor or trying to avoid him. His relationship with nature spirits could also change. Since Nyx is such an ancient and powerful force, the balance in nature might be affected by his connection to her, and he would have to deal with the consequences of that in his interactions with nature - related beings.
Among the demigods at Camp Half - Blood, some of the more romantic - minded ones might flock to Percy, thinking he can give them advice on love since he's related to Aphrodite. But Percy would be really out of his element here. And his relationship with the more 'tough' or battle - focused demigods might be strained, as they might see his Aphrodite connection as a sign of weakness or something that doesn't fit with their warrior - like image of him.
His relationship with Annabeth would be very different. Annabeth might be initially scared of Percy because of his dark lineage. She would be cautious around him as she is used to the more 'typical' demigods. Percy, on the other hand, might feel isolated from her because he knows she is wary. His friendships with the other demigods at Camp Half - Blood would also change. Some might avoid him, while others might be intrigued by his new powers and origin. Grover, for example, might be torn between his loyalty to Percy and his fear of what Percy could become.
With his friends like Grover, Percy would seem like a completely different person. Grover is used to Percy's emotions guiding his actions. Now, Percy would be cold and calculating. His friends would have to constantly remind themselves that this is still Percy, but it would be hard for them to connect on the same level. They might start to doubt if they can still trust him, as his lack of emotions could make his decisions seem unpredictable.
His relationship with Annabeth would be very different. Instead of just being friends and potential love interests, they would be more like family. Annabeth might see Percy in a new light, as someone who shares a closer bond with her mother. There could be more of a sense of loyalty and protection between them.
Percy's relationship with his father, Poseidon, could be a bit strained. Poseidon might not understand this strange 'Jedi' thing that his son is so into. He could see it as a distraction from Percy's duties as a demigod. However, Percy could try to convince his father that there are similarities between the power of the sea and the Force. With his friends from Camp Half - Blood, those who are more open - minded would be excited to learn about the Jedi ways from Percy. They would engage in discussions about how Jedi ethics can be applied in their demigod lives. But the more conservative demigods might see Percy as a threat to their traditional values and try to isolate him.
His relationship with Annabeth would be different. She'd have to get used to this new side of Percy. There might be some initial tension as she tries to understand his ice powers and how they fit into their relationship. His friends at Camp Half - Blood would also be in awe and a bit cautious. They'd respect his new power but might not know how to act around him at first. Some might even be jealous.
His relationship with Annabeth might change. She could be both impressed and a bit jealous of his new skills related to Hephaestus. Percy would now have an area of expertise that she doesn't fully understand. With the Hephaestus kids, he might start as an outsider but gradually earn their respect as he proves himself in tasks related to their father's domain.
The relationship with Poseidon would be extremely complicated. Poseidon would be torn between his love for Percy and his fear of what Percy could become as Kronos' twin. He might try to distance himself from Percy at first, which would deeply hurt Percy. On the other hand, Percy's relationship with some of the minor gods might improve. Since they are often overlooked by the major gods, they might see Percy as a potential ally in changing the status quo. Percy's relationship with Luke, if he were still alive in this fanfiction, would also be interesting. Luke might try to use Percy's connection to Kronos to his advantage, but Percy would have to be careful not to be manipulated by Luke.
His relationship with Annabeth would be different. She might be a bit more cautious at first, as Percy's new heritage from Oceanus could bring unforeseen challenges. But they would also have a new level of respect for Percy's increased power. With his other friends like Grover, they might look up to him more, seeing him as having an even greater destiny. However, some characters might be jealous or suspicious of Percy, like some of the children of Poseidon who might feel overshadowed.
His relationship with the gods would be complex. The gods who are friends with Ares might be more favorable towards Percy. However, the ones who dislike Ares, like Poseidon in some ways, might be disappointed in Percy. Poseidon might worry that Percy is being led astray by Ares and could try to persuade him to give up this new role.