The 'soulmate' trope can be found in Percy x Luke fanfics as well. In this trope, they are destined to be together in some way, whether it's through a magical bond or a prophecy. This trope often adds a sense of fate and inevitability to their relationship. Additionally, the 'secret relationship' trope is used, where they have to hide their feelings and relationship from others in the Percy Jackson world.
One popular trope is the 'forbidden love' angle. Since Percy and Luke are on different sides in the original story, in fem Percy and Luke fan fics, this can be intensified. Their love is something that goes against the rules of their world, like the demigod/godly politics. Another is the 'power couple' trope. Fem Percy with her powers and Luke's own skills could be seen as a force to be reckoned with. They might team up against common enemies in ways that deviate from the original plot.
One popular trope could be the 'enemies - to - lovers' trope. Maybe Percy and Rhea start off on the wrong foot, but as the story progresses, they discover things about each other and fall in love. Another could be the 'soulmate' trope, where they are fated to be together in some way.
One popular trope is the 'slow - burn' relationship development. As they read the books together, their bond gradually deepens in a subtle way. Another is the 'mystery solving' trope, where the books they read might contain clues related to their own adventures or mysteries in their world.
A really interesting plot twist in fanfics about Percy and Luke is when the roles are reversed. Luke becomes the hero, and Percy is the one who is on the verge of turning to the dark side. It makes the readers see the characters from a whole new perspective. Another plot twist could be that they both get transported to a different dimension where they have to rely on each other completely to survive and get back home.
The 'Secret Sibling' trope also shows up. Imagine a story where it's revealed that one of the Weasley kids has a demigod sibling they never knew about. Or that one of Percy's half - siblings is actually a wizard in disguise. There's also the 'Time - Travel' trope. A character could go back in time and change events in both universes. For instance, a demigod could go back and prevent Voldemort's rise to power, or a wizard could go back and stop the Titans from awakening. These tropes add new and exciting twists to the existing stories of both series in fanfic.
The 'soulmate' trope is also quite common. Writers often explore the idea that Luke and Mara are fated to be together, whether it's through some Force - related connection or just a deep, unspoken bond that they share. This trope can lead to some really heartwarming and mystical stories.
One aspect that could be explored in a Percy Jackson and Luke fanfic is their opposing views. Percy stands for the good, while Luke turns to the dark side. A fanfic could delve into what might have made Luke change his path if Percy had intervened earlier. It could show their early interactions at Camp Half - Blood and how Percy's loyalty and Luke's growing resentment were seeded.
A common theme could be redemption. Since Luke made some bad choices, a fanfic could focus on his journey towards redemption. Percy could play a key role in this, either by being the one to offer forgiveness or by being the example that makes Luke want to change.
I really liked 'Luke and Percy: A New Beginning'. In this fanfic, the author imagines a scenario where Luke gets a second chance. Percy is initially skeptical but as the story progresses, they form a bond that is both unexpected and heartwarming. It's a great read for those who want to see a different side of their relationship.
The 'fish - out - of - water' trope is also seen a lot. When Percy ends up in Thor's world or vice versa, they are both out of their element. Percy has to deal with the strange Norse landscapes and customs, while Thor might struggle with the modern - day world if he goes to Percy's. It creates a lot of comical and interesting situations in the fanfiction.