Another plotline might involve the twelve masters teaching Percy new and unique powers or skills. Since they are masters, they surely have a wealth of knowledge. Percy could then use these new skills to overcome challenges that he previously couldn't. For instance, one master might teach him a more advanced form of water manipulation.
One interesting plotline could be the interactions between Percy and the twelve masters. Maybe they have to work together to face a new and powerful enemy that threatens both the mortal and the demigod worlds. For example, a primordial force that has been awakened.
Percy Jackson himself is always a memorable character. His courage and loyalty are his trademarks. In this fanfiction, his interactions with the twelve masters would likely highlight these traits even more as he faces new challenges.
One interesting plotline could be the Seven facing a new, more powerful enemy that is a combination of different mythological creatures. This would test their teamwork and individual powers in new ways.
One interesting plotline could be Aphrodite taking a special interest in Percy for a quest related to love and beauty. Maybe she tasks him with finding a lost artifact that has the power to enhance or destroy love. Another could be Percy falling under a love spell cast by Aphrodite, which causes chaos among his friends as he starts acting out of character. And a third one might be Aphrodite using Percy as a pawn in a love - related game among the gods, where his actions and decisions have far - reaching consequences for the relationships between the deities.
One interesting plotline could be the siblings going on a secret quest together without the knowledge of Chiron or the other campers. They might face a new and unknown monster that tests their combined skills.
In some fanfictions, a centurion discovers a long - lost prophecy that involves Percy. This could lead to a race against time as they try to figure out the meaning of the prophecy and prevent a great disaster. Maybe it involves a new Titan rising and they need Percy's unique connection to the sea gods to stop it.
Maybe in the fanfiction, Percy's player side shows up when he has to navigate the complex social hierarchies of the demigod world. He could be seen charming different groups of demigods, from the children of Athena with his quick - witted remarks to the children of Aphrodite with his newfound 'player' charisma. This could lead to all sorts of adventures and conflicts as he tries to maintain his relationships while also keeping up his player image.
Another plotline could be Percy trying to find a way to clear his name and escape the prison. Along the way, he might make some unexpected allies among the inmates or even some prison staff who are sympathetic to his cause. This could lead to an epic adventure within the prison walls as he tries to gather evidence and outwit his captors.
One interesting plotline could be Percy trying to find a way to return home while facing new and unexpected challenges in his exile. He might encounter strange creatures or make new allies.
One interesting plotline could be a yandere character becoming overly possessive of Percy. For example, they might try to isolate him from his friends at Camp Half - Blood, seeing them as threats to their 'relationship' with Percy. Another could be a yandere secretly sabotaging Percy's quests out of the fear of losing him. They think that if he doesn't go on these dangerous quests, he'll be safe and stay with them.
One interesting plotline could be Percy having to face a new and powerful ancient evil that the gods are also afraid of. This would put him in a position where he has to use his wits and powers in ways he hasn't before.