Well, it could start with Athena making a decision that Percy believes will lead to the destruction of Camp Half - Blood and all the demigods. Maybe she's under the influence of an ancient evil. Percy tries to reason with her, but she won't listen. So, he has to consider killing her to protect his friends and home. Along the way, he faces opposition from other demigods who still believe in Athena's goodness. Percy then has to find a way to prove that Athena is a threat, all while dealing with his own feelings of guilt and betrayal for even thinking about killing a goddess he once respected. It would be a story filled with drama, action, and moral quandaries.
Well, it's not something you see all the time. Fanfictions usually follow the general vibe of the original series where Percy is more of a hero, not a god - killer, especially not of Athena. That being said, in the realm of fanfiction, anything can happen. Maybe in a really dark or AU (alternate universe) fic, a writer could come up with a scenario where Percy has to kill Athena for some extreme reason, like to save the world from a greater threat that Athena has unknowingly become part of. But again, it's not a common thing.
One possible plot could be that Percy has been corrupted in some way, perhaps by a powerful and evil force. Athena, seeing him as a threat to the safety of the demigod world and the order she represents, decides to take matters into her own hands and kill him. This could lead to a lot of conflict among the other characters, some who might believe Percy could have been saved and others who support Athena's decision.
There might be such fanfictions out there. You could start by looking on popular fanfiction websites like Archive of Our Own (AO3) or Fanfiction.net. However, the idea of Athena killing Percy is quite dark and might not be very common. You'll need to use the search functions on these sites and try different combinations of words related to 'Athena', 'Percy', and 'killing' to see if you can find any relevant stories.
In these fanfictions, Percy often retains his bravery and loyalty. His more impulsive nature can create interesting dynamics with Athena's calculated wisdom. For example, he might rush into a situation while Athena is thinking of a strategic plan.
One great Percy and Athena fanfiction is 'Percy's Athena - Bond Beyond Olympus'. It delves into an unexpected bond between Percy and Athena. In this story, Percy discovers a new side of Athena as they embark on a quest together that challenges their beliefs and forces them to rely on each other in ways they never thought possible. It's filled with great character development and exciting plot twists.
It could also be due to a sense of ownership. Percy has achieved a lot with the help of the gods, and Athena might feel that she has some claim over him because of the assistance she or other gods associated with her have provided. In the context of the fanfiction, this sense of ownership could translate into possessiveness.
I'm not sure who the absolute best is, but there are some popular ones. Some authors who are known for their detailed characterizations might be good. They can really dig into the personalities of Athena and Percy and create engaging stories. You can often find these authors by looking at the top - rated fanfictions in the relevant categories.
One common theme is the mentorship aspect. Athena often acts as a mentor to Percy, guiding him with her wisdom. Another theme is the exploration of their unique relationship, different from Percy's relationships with other gods.
A good Percy and Athena fanfiction often has strong character portrayals. Since they have such distinct personalities in the original series, it's important that the fanfic writer captures that essence. For example, Athena's wisdom and Percy's impulsiveness. Also, an interesting plot is key. Maybe a plot that involves them working together on a task that neither could complete alone, like solving a mystery that requires both Percy's on - the - ground experience and Athena's intellectual prowess.