The main character is Percy, no doubt. But don't forget about the other campers at Camp Half - Blood. They could be involved in different ways. Some might be worried about Percy and offer their support in small ways. Others could be a bit jealous of all the attention Percy is getting and cause some minor conflicts within the camp while Percy is sick. And of course, Percy's mom could also be a character. She might come to the camp to be with her sick son, adding an emotional touch to the story.
Obviously, Percy would be the main character as the story is about him getting sick. But his friends like Annabeth and Grover would also be important characters. They would be the ones trying to help Percy get better, so they play a big part in the fanfiction.
Obviously Percy would be one of the main characters as he is the one who is sick. His best friends like Annabeth and Grover would likely also be main characters as they would be taking care of him or trying to find a cure for his illness.
Joho is the main one for sure. But there could also be a love interest. Maybe someone who has always had feelings for Joho and uses this time when he's sick to get closer to him and show their care.
Obviously, Danny would be the main character since he's the one getting sick. His friends, Sam and Tucker, would also play important roles. They would likely be the ones trying to help Danny get better and keep his secret if he doesn't want it known.
The main characters would surely include Percy. Then, there could be Tyson, Percy's half - brother. Tyson could be really worried about Percy and use his strength to protect him while he's sick. Also, Chiron in his disguised form as a teacher at the school could play a major role. He has a lot of knowledge about demigod illnesses and could guide Percy's friends on how to help him.
Grover could also be a main character. He might be at the scene when Percy gets drunk and try to use his nature - related powers to sober Percy up. Grover could also provide some comical relief with his reactions to Percy's drunken state, like his horrified expressions or his attempts to herd Percy like he would a wild animal.
Well, one possibility is that Percy's friends try to find a cure. Maybe Annabeth uses her wisdom to research in the library of Camp Half - Blood while Grover tries to use his nature - related powers to find some special herbs. And Percy is just lying in his cabin, feeling really weak and feverish.
Definitely his family members. His mother, for example, would be a crucial supporting character. She would be worried sick about him and would do everything in her power to take care of him. His father might also play a role, perhaps using his godly powers in some way to ease Percy's suffering.
Sonic would be a likely main caregiver. He and Tails are very close friends. Sonic would use his speed to quickly get any medicine or supplies that Tails needs.
Obviously Elsa herself would be one of the main characters since she is the one getting sick. Anna would also be a main character as she would be very concerned about Elsa's condition and would do everything she can to help. Olaf could also play an important role, using his cheerfulness to try to make Elsa feel better.
Obviously, Bendy would be one of the main characters since he's the one getting sick. His friends like Boris and Alice would also be main characters as they would likely be involved in taking care of him or finding a cure.