Power is a big theme. The powers of the Sailor Scouts, which are based on elements like the moon and stars, are different from the vampiric powers in Vampire Knight. In crossover fics, there's often a comparison or a combination of these powers. Also, the idea of good vs evil is common. Sailor Moon and her friends are the defenders of love and justice, while vampires in Vampire Knight are often seen as more morally ambiguous. So seeing how they interact in the face of threats is a theme. Sometimes, there's also the theme of transformation. Both series have elements of transformation, and in crossovers, it can be interesting to see how the two types of transformations interact.
Well, identity is a common theme. Characters from both universes have to re - evaluate who they are when they are in a crossover situation. Are they still just a Sailor Scout or a vampire? Or do they become something new? Another theme is the exploration of different cultures. The Japanese - influenced settings of both series bring in cultural elements that can be blended in the crossover. For instance, the traditional vampire lore in Vampire Knight and the Japanese magical girl tropes in Sailor Moon. And of course, the theme of redemption can be found in some crossovers, especially when vampires in Vampire Knight might be looking for a way to be redeemed through the influence of the Sailor Scouts' positive values.
Friendship is a big theme too. Characters from different universes in Sailor Moon crossover fanfic often become friends and learn from each other. They support each other in battles and in personal growth. Also, the theme of saving multiple universes is quite common. Since it's a crossover, there are usually threats that endanger both the Sailor Moon universe and the other crossed - over universe.
One great Vampire Knight Sailor Moon crossover fanfic is 'Moonlit Knights'. It combines the dark and brooding atmosphere of Vampire Knight with the magical girl elements of Sailor Moon in a really interesting way. The characters from both universes interact in unexpected ways, like how Usagi might react to the vampires in Vampire Knight. Another one could be 'Starlit Bloodlines' which delves deep into the lore of both series and creates a unique story line where the Sailor Scouts have to deal with the vampire world.
One common theme is the clash between good and evil. The Sailor Guardians, who represent good, have to face the vampires, often seen as a form of evil. Another theme is transformation. Just as Sailor Moon and her friends transform in the original series, in the fanfiction, they might have to undergo new transformations to deal with the vampire threats.
One common theme is power combination. Writers often explore how the powers of Sailor Moon characters combine with those from the other crossover universe. For example, in a Sailor Moon and Dragon Ball Z crossover, they might look at how Sailor Moon's magic could work with the energy - based attacks in Dragon Ball Z.
Another theme is the power of friendship. Both Sonic and Sailor Moon series value friendship, and in crossovers, it's often about how the characters from both sides form bonds and work together. For example, Sonic's loyalty to his friends and Sailor Moon's strong relationships with the Sailor Scouts combine to create a united front against common enemies.
Another theme is the teamwork between the two sets of characters. For example, the Sailor Guardians are used to working together in their own way, and Sam and Dean Winchester have their own dynamic. In these crossovers, they have to find a way to combine their skills and strategies to face the threats. Usually, they start off a bit at odds but gradually learn to trust and rely on each other. This theme of building new relationships across different universes is quite prominent.
One common theme is self - discovery. The OC daughters often start out not fully aware of their powers or their place in the Sailor Moon universe, and the story follows their journey to figure these things out. For example, they might discover they have a special connection to a certain Sailor Scout.
Love and forbidden relationships are also very common. Since werewolves and vampires are often depicted as enemies in their respective mythologies, a relationship between a werewolf and a vampire knight is seen as taboo. Fanfictions explore this idea by creating stories where the two characters fall in love despite the odds. It adds an element of drama and romance to the plot. Another theme is power struggles. Both werewolves and vampires have their own hierarchies and power structures, and when they cross over, there are often battles for dominance and control.
Another theme is power. Naruto is known for his strong powers in his own universe, and in the Vampire Knight world, there are different power dynamics among the vampires. Fanfictions may show how Naruto's powers compare or combine with those of the vampires. For example, his chakra could have unexpected effects on vampire abilities. It's really interesting to see how the power balance is adjusted in these crossovers.
One common theme is the combination of powers. Since both series have characters with unique abilities, fanfictions often explore how these powers can work together. For example, the Saiyans' strength combined with the Sailor Scouts' magic.