Another plot could involve Percy getting a vision from Athena about a future threat to the demigod world. But the vision is so cryptic that he has to work closely with Athena to decipher it. Along the way, they build an unexpected bond, different from his usual relationships with other gods. Maybe Percy starts to see Athena not just as a powerful deity but as a mentor figure, and Athena starts to respect Percy's tenacity more than she expected.
One idea could be a new quest where Percy and Annabeth have to find a lost artifact related to Athena that was stolen by a rogue demigod. This would involve them traveling to new and dangerous places, facing off against mythical creatures they haven't encountered before.
One plot idea could be that Percy, in his adventures, discovers a long - lost prophecy related to Athena. As he delves deeper into understanding it, he starts to develop a new - found respect and a kind of platonic love for Athena. He might see her not just as a goddess but as a key figure in the fate of the world and their relationship could be based on mutual understanding of the greater good.
Another plot could involve Percy having to prove himself to the children of Athena. Since he's not a child of Athena, they might be skeptical of his abilities at first. But as they face challenges together, like deciphering ancient prophecies that are hidden in Athena - related temples, Percy shows his worth through his quick thinking and battle skills. This could lead to a great friendship and mutual respect among them.
A really interesting plot could be that because he's Athena's brother, Percy is suddenly given access to some of Athena's knowledge. But this knowledge comes at a price. He starts to lose some of his own identity as a son of Poseidon. He has to go on a journey, both physically and mentally, to find a balance between his new - found connection to Athena and his loyalty to his father. Along the way, he meets various mythological creatures who either help or hinder him in this struggle for self - discovery.
One idea could be a story where Percy teams up with the Athena Hunters on a quest. Maybe they are searching for a lost artifact that has the power to change the balance between the gods. Percy's water powers could complement the skills and knowledge of the Athena Hunters.
One interesting plot could be Percy having to team up with Athena in a quest that involves outsmarting a powerful enemy. Since Athena is the goddess of wisdom, she uses her intelligence to create strategies, and Percy has to follow them, which is a big change from his usual more impulsive adventures.
One idea could be Percy struggling to fit in with Athena's children at first. Since he's used to being a son of Poseidon, he has different ways of thinking and acting. Another plot could involve him using his newfound Athena - given wisdom to solve a really complex mystery in the demigod world. Maybe he discovers a new prophecy related to Athena that only he can understand because of his unique position as her adopted son.
One interesting plot twist could be that Annabeth discovers a hidden power within herself that has nothing to do with Athena. Maybe she can suddenly communicate with mythical creatures in a way no one else can. Another could be Percy finding out that he has a long - lost sibling who is actually on the side of the enemy, but then later switches sides. And a third one might be that the Mark of Athena is actually a fake, created by an enemy to mislead the demigods and lead them into a trap.
There's also 'Percy and the Goddesses' Union'. In this fanfic, Percy finds himself in the middle of a complex relationship between Artemis and Athena. It shows how his interactions with them change over time, starting from distrust to a deep - rooted respect and something more. The plot is full of twists and turns that keep you hooked.
Well, one possibility is that Percy would gain a whole new set of strategic skills. Since Athena is the goddess of wisdom, she might teach Percy how to outwit his enemies in more complex ways. For example, instead of just relying on his sword fighting skills, he could learn to anticipate his opponents' moves based on their past behaviors and psychological patterns. Also, Athena could introduce Percy to ancient battle tactics that were used by the greatest Greek heroes. This would make Percy a more well - rounded fighter and hero, able to handle different types of challenges that he may face in his adventures.