Another theme is friendship and teamwork across different universes. When Percy teams up with characters from other fictional worlds, they have to learn to trust and work together. This shows how different characters with diverse backgrounds can come together for a common goal, like saving both their own worlds and the ones they've crossed over into.
Another theme is the idea of a shared threat. Since both Percy and Harry are heroes in their own right, a lot of crossover fics will have them face a danger that neither could handle alone. This could be a new dark force that combines the worst of the magical and demigod worlds, like a villain who can use both dark magic and the power of the Titans. It makes for some exciting plotlines as they have to learn to work together.
One common theme is identity. Since Percy is reincarnated in a different setting, he often has to figure out who he is in this new life. Another theme is adaptation. He has to adapt to new rules, powers, and cultures in the crossover world. For example, if he's reincarnated into a world with different magic systems, he has to learn how to use them.
One common theme is the clash of different worlds. For example, when Percy crosses over to a different fictional universe, his demigod nature might be at odds with the new world's rules or powers. This creates tension not only in the action scenes but also in the romantic relationships. Another theme is the discovery of new selves. As Percy or other characters interact with new love interests from different realms, they often learn more about themselves and grow as individuals.
Friendship and teamwork also play a big role. Percy is used to working with other demigods, but in the Destiny crossover, he has to form new alliances with Guardians. These relationships are often explored, like how they overcome their differences in beliefs and fighting styles to work towards a common goal, such as saving both their worlds from a shared threat.
Another theme is power combination. Since Naruto has chakra - based powers and the demigods in Percy Jackson have their own divine powers, fanfictions often explore how the fem Naruto character combines her ninja skills with the demigod powers she may acquire or encounter. For example, using shadow clones along with some sort of demigod - related magic.
The theme of human nature also often appears. In the extreme situation of a zombie crossover, some characters may show their best side, like selflessness and heroism in helping others survive. But others may show their worst, becoming selfish or even cruel. Writers use this to explore how people really are when pushed to the limit in these strange and dangerous crossovers.
One common theme is the clash of cultures. For example, when vikings cross over to a different world, they might have different values and beliefs compared to the native inhabitants, which leads to interesting conflicts.
Power dynamics is another theme. Spartacus was a slave who fought against the power of the Roman Empire. In crossovers, his relationship with characters of different power levels, whether they are more powerful or less powerful, creates engaging storylines. For instance, if he crosses over with a powerful wizard, how does he deal with that new form of power? Or if he meets a group of oppressed people like himself, how does he lead or interact with them?
One common theme is the clash of cultures. For example, when Whitebeard is crossed over into a modern or a very different fictional world, his pirate - based values and the way of life in his world are different from the new setting. Another theme is the test of loyalty. His crew's loyalty is often a central part in these crossovers as they face new challenges together.
One common theme is the clash of different cultures. For example, when characters from a modern - day or a different fictional universe enter Middle - earth in 'The Hobbit' crossovers, there's a contrast between their values and those of the hobbits, dwarves, etc. Another theme is the exploration of new powers. If a character with superpowers from another universe comes to Middle - earth, how those powers interact with the magic and skills in 'The Hobbit' world is often explored.