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.
With Kakashi, Naruto's lack of emotions would mean he no longer has the same student - teacher bond. Kakashi is used to Naruto's determination and exuberance. Without emotions, Naruto would be like a different person. He'd follow Kakashi's orders mechanically without the usual eagerness and the relationship would become more of a cold, professional one.
His relationship with Sasuke would become very strained. Usually, they have a complex bond based on rivalry and friendship, but as an emotionless killer, Naruto would see Sasuke more as a target or an obstacle. He wouldn't care about Sasuke's own goals or feelings.
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 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.
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 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.