Power imbalance is a very common theme. The vampire usually has more power, be it physical or social, compared to the slave. This creates a dynamic where the slave has to find ways to survive or gain some form of control in the relationship.
Redemption is also seen often. The vampire, who may have a dark past or be seen as a 'monster', can find redemption through their relationship with the slave. For example, the slave's kindness might make the vampire question his cruel ways.
Power dynamics is a very common theme. The demon queen usually has a great deal of power, and the slave has little or none at the start. Another theme is redemption. The slave might seek to redeem himself or be redeemed in the eyes of the demon queen. Also, loyalty often plays a big part, as the slave may show extraordinary loyalty to the demon queen.
Forbidden love is also a major theme. In vampire slave romance novels, the relationship between a vampire and a slave is usually frowned upon in their fictional societies. So the lovers have to overcome social and cultural barriers, which adds to the allure of the story. The vampires often have their own rules and taboos regarding relationships with slaves, and the human slaves may have their own fears and reservations about getting involved with a powerful vampire.
One common theme is power imbalance. The vampire is usually in a position of power, while the slave is powerless. Another theme is the struggle for freedom. The slave often tries to break free from the vampire's control.
The theme of the vampire society also often appears. The cute and dom vampires have to navigate through the rules and hierarchies of the vampire world. In some fanfictions, they might face opposition from other vampires due to their relationship, which adds to the drama and plot development.
One common theme is the struggle between two different natures. The vampire has its own set of powers and instincts, like a thirst for blood, and the werewolf has its own, like the change during the full moon. Their relationship often involves dealing with these differences.
Another theme is the exploration of the unknown. Vampires are often associated with mystery, and when combined with the already complex characters of Ruby and Cinder from RWBY, it creates a situation where the characters are forced to explore new aspects of their world and themselves. For example, Ruby might have to face her fears of the supernatural, while Cinder could be using the vampires for her own gain in a world she doesn't fully understand yet.
One common theme is the power dynamic. With Yami as a pharaoh and Yugi as a slave, there's an obvious imbalance which can lead to interesting relationship developments. Another could be redemption, like Yami trying to make up for the social injustice of slavery. And of course, love against all odds is often a theme as they overcome their differences in status.
Some themes could be about loyalty and betrayal. Given the unusual 'slave' concept, it might explore if Sakura remains loyal to Naruto or if there are elements of betrayal. Additionally, there could be a theme of self - discovery. Sakura might discover new aspects of herself while in this situation. And of course, there could be themes related to love and friendship, but in a very different and perhaps darker way compared to the original Naruto story.
The idea of sacrifice is also prevalent. The vampire may have to sacrifice their nature, like not drinking blood, or the human may have to sacrifice their normal life to be with the vampire. This is often seen in how they deal with the vampire's vampiric instincts and the danger it poses to the human.
Well, in 'harry x draco vampire fanfiction', a frequent theme is power dynamics. As a vampire, Draco might have certain powers that change the balance in his relationship with Harry. Another is the exploration of the unknown. Vampirism is something new and different in the Harry Potter universe, so the stories often explore how Harry and Draco deal with this unknown element. And of course, there's the theme of loyalty. Their loyalty to each other is tested as they face the challenges of Draco being a vampire.