He could also be very kind and gentle in his reaction. Percy might not want to hurt his friends' feelings, so he'd try to let them down easy if he doesn't feel the same way. He might say something like 'You're a great friend, and I value our friendship so much' to show that he cares about them but not in that romantic way. On the other hand, if he has some hidden feelings for one of them, he could start to show more interest in return, like spending more time alone with that friend.
Percy may initially be in denial. He might think that his friends are just being extra nice. But as more evidence piles up, he'd have to face the reality. If he's not ready for a romantic relationship with any of them, he could try to create some distance to sort out his feelings. However, if he is open to the idea, he could start to explore a new type of relationship with his friend - one that's more than just friendship. This would involve a lot of communication and understanding between them.
Annabeth would probably be a mix of amused and exasperated. She might tease him a bit at first but then help him out if he's in an uncomfortable situation because of the dress. Grover would be really shocked at first but then try to be supportive. He might say something like 'Well, Percy, you look... different, but it's okay!'. As for Tyson, he would just be happy to see Percy and not really care about the dress all that much.
Another possibility is that Percy is flattered. He respects Thalia a great deal and having her have a crush on him could boost his self - esteem. He might start to be a bit more aware of her presence and try to be nicer to her. For instance, he might start sharing his food with her during meals or offer to help her with her training. However, he could also be a bit confused because he might not have thought of Thalia in that way before.
Annabeth would probably be a bit skeptical at first. She might think Percy is just getting distracted from their Greek - related quests. But once she sees how his samurai skills could be useful, she would start to support him. Grover, on the other hand, would be more excited. He loves new things and cultures, and he would be eager to learn about the samurai world from Percy.
Annabeth would be furious. She would immediately confront Jason, demanding an explanation. She's very protective of Percy and would not stand for him being hurt without a good reason. She might even suspect Jason of having some ulterior motives at first. Nico, on the other hand, would be more reserved but equally angry. He would keep a close eye on Percy's recovery and might even be tempted to use his powers to seek revenge on Jason if Percy's condition was serious.
Blaise Zabini might be amused. He would probably tease Draco a bit at first, but then support him because Blaise is often portrayed as someone who is confident and not overly bound by convention. He might even give Draco some tips on how to make the hair color look even better.
Others might be a bit shocked at first. But after getting used to it, they could come around. For example, they might initially tease him a little but then realize it's just Harry being Harry and trying something new.
Well, his friends' reactions would be complex. Annabeth would likely be in a state of disbelief at first. But then she'd start to analyze the situation, trying to figure out what caused Percy to turn into a kid and how to reverse it. Grover would be more emotional. He'd be like a big brother to Percy in this state, making sure he doesn't get into too much trouble. And the other demigod friends would probably be a bit confused, but they'd come together to support Percy and try to find a solution. They'd also have to deal with the fact that Percy's abilities and knowledge are now limited as a kid, which would change the way they work together.
His friends would likely be shocked at first. Annabeth might feel a sense of loss as Percy is now something different. Grover would probably be worried about how Percy is handling his new godly status. They would also be concerned about whether Percy would still be on their side or if his new powers and responsibilities would change him.
Percy would likely be both angry and calculating. He'd be angry because he's been kidnapped, but he'd also start thinking about how he can use his powers and skills to get out of the situation. He might try to reason with Khione if he thinks it could buy him some time to plan an escape. He'd also be looking for any weaknesses in Khione's defenses or in her personality that he could exploit.
At first, Percy would likely be angry. He has faced so many challenges with the belief that his father was on his side. The betrayal would make him feel like all his efforts were in vain. He could lash out, perhaps even using his powers in a more reckless way. But as time goes on, he might start to question if there's a deeper reason behind Poseidon's actions and try to find out the truth, especially if he still has friends who believe in him and encourage him to look deeper.