One common theme is perseverance. Percy has to keep training hard and not give up in the face of tough competition. Another theme is self - discovery. As he becomes a famous swimmer, he learns more about himself and his capabilities. For example, he might discover that he has a greater tolerance for pain and stress than he thought. Also, friendship is often a theme. He could have friends who support him through his swimming journey, or he might make new friends in the swimming community.
In the fanfiction world, 'Percy Jackson: A Swimmer's Destiny' is quite good. It starts with Percy being recognized for his extraordinary swimming talent in the mortal world. But as the story progresses, he realizes his swimming is linked to his demigod heritage. He has to compete in a series of swimming challenges that are not just about speed but also about using his demigod powers underwater. Another interesting one is 'Percy, the Olympic - level Swimmer'. Here, Percy aims to participate in the Olympics, but he has to deal with various mythological obstacles that try to stop him from achieving his dream, all while using his amazing swimming skills.
One common theme is self - discovery. Percy often discovers new things about himself and his powers while swimming. Another theme is competition. He might compete against other swimmers or mythical beings in the water. Also, there's the theme of heroism. His swimming skills are often used to save others or complete heroic tasks.
One popular 'Percy is a famous swimmer' fanfiction might be 'Percy's Aquatic Ascent'. In this fic, Percy's journey as a swimmer is filled with intense training sessions and rivalries. He overcomes various challenges both in and out of the pool, like dealing with a strict coach who has high expectations. Another could be 'Percy: The Swimmer Extraordinaire' where Percy not only competes at a national level but also uses his swimming skills to help his community by teaching underprivileged kids how to swim.
One possible storyline could be Percy using his water - related powers to his advantage in the Olympics. For example, he might be able to swim faster than normal humans because of his ability to control water currents. Another could be him facing challenges from other supernatural beings who are also competing in the Olympics, disguised as regular swimmers.
Well, it could be about a young fan who dreams of meeting Percy. Maybe the fan follows Percy's journey to the Olympics, writes him letters, and finally gets to meet him at an event. It could also involve the fan getting inspired by Percy to start swimming themselves and facing their own challenges in the pool.
Obviously, Percy would be one of the main characters. And then there could be the fan, who might be a young person, maybe a teenager named like, Sam or something. There could also be Percy's coach, who plays an important role in his training and success at the Olympics.
A possible biggest rival could be another demigod who has water - related powers but uses them in a more underhanded way. This rival might be jealous of Percy's natural talent and try to sabotage him during the races.
The 'famous Percy' could be a super - fan who has made a name for himself by creating amazing fan art of Percy. When Annabeth meets him, she is impressed by his creativity and how well he has captured Percy's likeness in his art.
One great 'Castle Swimmer' fanfiction is 'The Lost Adventures of the Castle Swimmers'. It delves deeper into the backstories of the characters. It shows how the characters might have interacted before the main events of the original story. The author has a great writing style that really brings the underwater world to life.