Well, the theme of mystery is quite common. The prophecy itself is usually full of mystery, and the vampire characters have to piece together clues about it. Another theme is sacrifice. The vampires may have to sacrifice something - be it their relationships, their power, or even their lives - in order to fulfill the prophecy. And there's the theme of transformation, not just physically as vampires, but also in terms of their character as they are shaped by the events related to the prophecy.
One common theme is destiny. Since it's about a prophecy, the vampires are often fated to do certain things. Another is power struggle. Different vampires may vie for control or try to influence the prophecy's outcome for their own gain. And there's also the theme of self - discovery as the vampire characters figure out their place in the prophecy.
A common theme is self - discovery. Naruto often has to figure out his place in the prophecy and how it relates to his identity. Another is power. Prophecies usually involve some sort of great power that Naruto will either gain or use.
One theme that often shows up is the idea of isolation. Naruto may feel isolated because of the weight of the prophecy. People might treat him differently, either with excessive reverence or fear. This can lead to him feeling alone, even among his friends. Additionally, the theme of sacrifice is also common. Naruto might be faced with situations where he has to sacrifice something important to fulfill the prophecy.
One common theme is the struggle with identity. Harry, being a vampire, has to deal with a new side of himself that he may not fully understand at first. For example, in many fics, he has to figure out how to balance his wizard self with his vampire instincts.
One common theme is the struggle between humanity and vampirism. When Ash is involved, it often shows his fight to keep his humanity intact even in the face of vampiric allure.
The theme of the outcast is also prevalent. Despite her power and allure, the vampire seductress is often an outcast in both the human and vampire worlds. Humans fear her, and vampires might be jealous of her power or see her as a threat. This sense of not belonging adds depth to her character and is often explored in different ways in fanfictions. For instance, she might try to find a place where she can be herself, or she might use her outcast status to her advantage by creating her own rules and living on the fringes of society.
Another theme is love and relationships. Since he's a vampire, his relationships with other characters, whether it's romantic or platonic, are often complicated. There might be a love interest who has to come to terms with Todoroki being a vampire, like in 'Todoroki's Vampire Love Affair' where the female lead has to navigate her feelings while also dealing with the danger that comes with Todoroki's vampirism.
A sense of otherworldliness is another theme. Vampire hypnosis fanfiction often plays on the idea that the vampire's world is different from the human world, and the hypnosis is a bridge between the two. In stories like 'The Otherworldly Hypnosis of Vampires', the hypnosis not only affects the human's mind but also gives them glimpses into the vampire's strange and alluring world, full of different rules, powers, and social hierarchies.
The theme of redemption can also be present. Sasuke may have a dark past as a vampire, and through his relationship with Sakura, he may seek redemption. This could involve him trying to control his vampiric urges or make amends for past actions.
In RWBY vampire fanfiction, a frequently seen theme is the clash of cultures. The RWBY world has its own set of values, and vampires bring in their own set of rules and behaviors. This can lead to interesting interactions and conflicts. Another theme is the search for a cure. If a character is turned into a vampire, they or their friends may be on a quest to find a way to reverse the transformation. And the theme of outcasts also exists. Vampires are often seen as outcasts in the RWBY world, and this can be explored in terms of how they deal with being shunned by society and how they form their own communities or try to integrate into the existing ones.
A common theme is the clash of two different worlds. Sonic represents speed, freedom, and heroism, while vampires often symbolize mystery, darkness, and immortality. So, there's often a struggle when these two meet.