There's often the 'secret origin' trope. Maybe the reader's transformation is part of a bigger prophecy or some long - forgotten vampire ritual. And then there's the 'vampire mentor' trope, where an older, more experienced vampire helps the newly - turned reader navigate their new life, teaching them about hunting, hiding from sunlight, etc.
One common trope is the 'demon protector'. The demon takes on the role of guarding the reader from other threats in the story, whether they be other demons or some sort of dark magic. Another is the 'forbidden love' trope, as in the demon and the reader come from different worlds (human and demon) and their relationship is frowned upon by society in the fic's setting. And there's also the 'demon with a heart of gold' trope, where the demon may seem menacing at first but is actually kind - hearted deep down especially when it comes to the reader.
One common trope is the 'forbidden love' aspect. Since vampires are often seen as dangerous and different from humans, their relationship with the reader is considered taboo. Another is the 'protective vampire' where the vampire will do anything to keep the reader safe from other vampires or humans who might harm them.
One common trope is the 'fish - out - of - water' situation. For example, when the characters from Supernatural first arrive in Mystic Falls, they are confused by the different rules of the vampire society there compared to the monsters they usually hunt. Another trope is the 'power - struggle'. This could be between the powerful vampires like the Originals in Vampire Diaries and the angels or demons from Supernatural. They often have to compete or cooperate depending on the situation in the fanfic.
The exploration of immortality is also a frequent theme. The vampire's eternal life can bring a sense of both allure and loneliness. In 'vampire x reader' fanfics, the reader might be the one to break through that loneliness, or they might be in awe of the vampire's long existence. Additionally, the theme of transformation can be present. Whether it's the reader potentially becoming a vampire or the vampire trying to adapt to a more human - like life because of the reader.
Another common theme is mystery. Vampires have a long history and many secrets. In these fanfics, the reader is usually drawn into the mystery surrounding Sebastian Stan's vampire character. This could include his past, his powers, or the reasons for his interest in the reader. It makes the story more intriguing and keeps the reader hooked.
Well, 'Hidden Potential' is a big trope. A Senju character in fanfics may seem ordinary at first but then discovers they have some amazing hidden potential within them related to their Senju heritage. 'Senju and the Tailed Beasts' is also common. Fanfics might explore how a Senju could potentially bond with or control a tailed beast in a way different from what we've seen in the original Naruto story. There's also the 'Ancient Prophecy' trope, where a Senju is part of an ancient prophecy that dictates their actions and the future of the Naruto world.
Well, 'Vampiric Awakening of the Reader' is also a good one. In this fanfic, the reader is transported into a world of vampires and gradually turns into one. The plot is full of twists and turns as they deal with vampire politics and their newfound powers.
A really popular trope is the vampire as an outcast, even more so than in regular vampire stories because of the already distrustful nature of Fallout 4's society. They might be hunted by some groups who see them as a new kind of abomination in the wasteland. Also, there's the trope of the vampire having special powers or abilities that are a combination of traditional vampire powers and something unique to the Fallout 4 universe, like being able to sense radiation in a different way or having an immunity to certain types of mutated creatures.
Another common trope is the transformation. A character in the Fire Emblem universe might get turned into a vampire, either by accident or as part of a dark plot. This then leads to their internal struggle with their new identity, as they have to balance their old loyalties and values with their new vampiric instincts.
One common trope is the eternal love aspect. Since vampires are immortal, their love can span centuries. For example, in many stories, a vampire falls in love with a human or another vampire and they face challenges together but their love endures.