Some characters might be in awe of Percy. For example, Annabeth could be both proud and a little bit worried. Proud because Percy has reached what seems like a new level of power, but worried about how this new status will change him and their relationship. Grover, on the other hand, would probably be very excited. He's always been Percy's loyal friend and seeing Percy as a god - like figure would make him feel even more special to be associated with Percy.
The other demigods could be split in their reactions. Some might see Percy as a threat. If they believe Jason's idea that Percy is a god, they could fear that Percy will start to dominate or change the way things are at Camp Half - Blood. They might be jealous of the power Percy seems to have. However, there would also be those who would be curious and want to learn from Percy. They might think that if Percy can achieve god - like status, there's a chance for them to gain more power too.
Annabeth might be a bit jealous or at least very protective of Percy. She could sense something is different in Piper's behavior towards Percy and become suspicious. Jason, on the other hand, might be confused as he has his own relationship with Piper. He would probably try to talk to Piper about it to understand what's going on.
Well, it could be that there's some sort of magic or illusion at play. Jason might be seeing Percy as a god because he's been influenced by an external force. This external force could be an enemy trying to create chaos by making the other demigods believe Percy is a god. And Percy has to then figure out what's going on and clear his name while also dealing with the new - found respect or fear from his peers.
At the start, Percy would likely be in disbelief. But as things progress, he could use this new identity to his advantage. For example, he might be able to intimidate some of his enemies. However, he'd also feel guilty because he doesn't like deceiving people. Eventually, he would try to find a way to set the record straight while also using this situation to help his friends and the world he cares about.
Annabeth would be furious. She'd immediately start planning a rescue mission. She might call on all of Percy's friends and allies at Camp Half - Blood. Annabeth would use her strategic mind to figure out where Nico has taken Percy and how to get him back.
Chiron would be concerned. He knows how important their relationship has been for the stability of the camp and for their own growth as demigods. He would likely try to mediate and help them work through their issues, if possible. If not, he would worry about how it will impact their future quests and the overall well - being of the camp and its inhabitants.
The campers at Camp Half - Blood would be shocked. Some might take sides, especially those who are closer to either Percy or Annabeth. The Aphrodite cabin might be all up in the drama, trying to play matchmaker again to fix things. The Ares cabin might see it as a sign of weakness in Percy and try to pick on him a bit more. Overall, it would create a lot of gossip and tension around the camp.
The characters' reactions would vary widely. Annabeth would likely be critical of any fanfiction that got the details of her character or her knowledge wrong. She's very intelligent and detail - oriented, so inaccuracies would bother her. On the other hand, if a fanfiction captured her essence well, she might secretly enjoy it. Leo would probably be excited to see all the creative ideas people had in fanfiction, especially if there were cool new inventions or adventures in them.
Annabeth would be completely devastated. She would probably go into a state of shock at first, then be filled with anger and determination to find a way to bring him back, if possible. She might even go on a solo quest to try and reverse his sacrifice.
Annabeth would be devastated. She and Percy had a deep connection. She might go into a state of shock initially and then be filled with rage towards the enemies. She could become more reckless in her attempts to avenge Percy.
Jason might be shocked at first. He could feel a sense of respect for Percy, knowing that those scars are the marks of his many battles and hardships. Maybe he would be more curious about Percy's past adventures that led to those scars.