Percy is the central figure in this fanfiction. However, other characters like Grover might also play significant roles. Grover could be using his nature - related abilities to track Percy down. And there might be new characters introduced who are related to the power that seals Percy away.
Obviously, Percy is one of the main characters. His friends like Annabeth might also be important as they could be the ones trying to find and rescue him.
One possible plot could be Percy's struggle against the power that seals him away. Maybe he has to find a way to communicate with his friends on the outside to get help. Another could be the discovery of the true motives behind his seclusion.
Maybe it's an ancient and powerful entity that has been awakened. Percy might be in the wrong place at the wrong time and this entity, seeing Percy as an intruder or a potential disruptor of its slumber, decides to seal him away using its otherworldly powers.
Percy is surely a main character in this fanfiction. Depending on the universe it's set in, if it's related to a series like Percy Jackson, characters such as Annabeth, Grover, or his other demigod friends might also be important characters. They could either be the cause of Percy's anger or the ones who try to calm him down and help him through his angry state.
Obviously, Percy would be the main character. But there could also be his friends who might be trying to find him after he runs away. For example, Annabeth could be a major character in the story as she would be worried about Percy and use her intelligence to track him down.
Obviously Percy would be one of the main characters. And there could be a new friend he makes in the new place, let's say a girl named Lily who helps him explore the new town.
The main characters are clearly Percy and Sally. Percy is likely a central figure who will have to deal with the consequences of getting Sally pregnant. Sally, on the other hand, is the one who is going to have the baby, so she will also be facing a lot of physical and emotional changes.
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.
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.
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.
His best friend could be one of the main characters. They would likely be very concerned and play a big role in his recovery.