One common theme is the struggle between the vampire nature and human emotions. Since the oc vampires are often new creations, they have to deal with things like bloodlust while still having remnants of human feelings.
Another one is 'Vampire's Redemption'. The oc vampire in this story is on a journey of self - discovery. It has a lot of great character development and the author does an excellent job of creating a believable story within the Twilight setting.
One common theme is the struggle for acceptance. The OC often has to fight to be accepted by the existing groups like the vampires or werewolves. For example, in many stories, the OC might be a half - vampire half - human and is shunned at first.
The concept of the first vampire in this fanfiction might be unique because it could have a different origin story than the traditional vampire lore. Maybe it wasn't created through a bite but through some ancient magic or curse that was specific to the Twilight world.
Imagine Naruto in the Twilight vampire world. He would probably be an outlier among the vampires. His sunny disposition and strong sense of justice from the Naruto world would contrast with the often brooding and secretive nature of Twilight vampires. His chakra system could interact in strange ways with his new vampire physiology. Maybe his Rasengan could take on a new form with the added vampire energy. And his relationships with characters like Sakura and Sasuke would be completely different. Sakura might be both fascinated and repelled by his new vampire state, while Sasuke could see it as another way for Naruto to gain power and might be jealous or intrigued. There would be so many possibilities for character development and plot twists in such a fanfic.
Often, these fanfics explore new character traits of Twilight Sparkle. When she's faced with the vampire world, she may show more courage or a different side of her intelligence. It's interesting to see how she adapts to this new and dangerous environment.
There's a fanfic called 'Oc's Adventure with Twilight'. It shows the OC and Twilight going on a journey through different parts of Equestria. The way their relationship grows over the course of the story is really well - written, and the descriptions of the places they visit add to the charm of the fic.
Another theme is self - discovery. The oc may start off not knowing much about themselves, but through their experiences with Seth and in the Twilight world, they learn more about their own identity, their strengths, and their place in this strange new world.
One great Twilight Vampire Diaries OC fanfiction is 'The New Arrival'. It has an interesting original character who gets caught up in the drama between the vampires and werewolves. The author does a great job of integrating the OC into the existing storylines.
One common theme is the struggle between the vampire and human worlds. The OC often has to navigate this complex relationship, whether they are a vampire, a human, or something in between. Another theme is love and forbidden relationships. Since Vampire Knight already has a lot of that in the original story, OC fanfics often explore new love interests and how the OC fits into that. Power and identity are also common themes. The OC may be trying to discover their true power or come to terms with their identity in a world full of vampires and vampire hunters.