One popular trope is the 'forbidden love' aspect. Since Godric is a vampire and an OC (original character) is usually a human or some other non - vampire entity in the True Blood universe, their relationship often defies the norms of their respective species. Another trope could be the 'protector - protected' dynamic, where Godric, with his age and power, feels the need to safeguard the OC from the various dangers in the vampire - filled world of True Blood.
The 'discovery' trope is quite prevalent. The OC may be new to the world of vampires and through their relationship with Godric, they discover the hidden and often dangerous world of True Blood. There's also the 'soulmate' trope. Some fanfictions might explore the idea that Godric and the OC are fated to be together, despite all the odds against them in a world full of political intrigue and vampire - human conflicts.
A common trope is the 'culture clash'. Godric, being an ancient vampire, has his own set of values and traditions which are likely to be very different from those of a modern - day OC. This can lead to interesting scenarios where they have to navigate their relationship while dealing with these differences. Also, the 'redemption' trope can be seen. Maybe the OC helps Godric, who has a long and sometimes dark past, find a new path or a sense of peace.
The 'mystery' trope is also prevalent. The xenomorph's origin or purpose in the fanfiction might be a mystery that the OC is trying to solve. It could be linked to some ancient alien prophecy or a scientific experiment gone wrong. And then there's the 'transformation' trope. The OC may start to take on some characteristics of the xenomorph, either physically or mentally, as a result of their interaction.
One popular trope is the 'fish - out - of - water' story where the oc is new to the Avengers' world and has to adapt. Another is the 'romance' trope, like the oc falling in love with one of the Avengers. The 'mentor - mentee' relationship is also common, where an Avenger takes the oc under their wing.
The popularity of Eric, Oc, Godric fanfiction lies in the complex characters. Eric is a charismatic vampire, Godric has his own allure, and the Oc adds an element of mystery. Fans love exploring different relationships and scenarios with these characters.
One popular trope is the 'fish out of water' situation. The OC, being new to the master's world, has to adapt and learn the rules. Another is the 'forbidden love' trope, where the relationship between the master and the OC is not allowed in the context of the story's setting. And then there's the 'chosen one' trope, where the OC is somehow special and chosen by the master for a particular task or destiny.
In Twilight Emmett x OC fanfiction, the 'power imbalance' trope can be seen. Emmett has all the powers and immortality of a vampire, while the OC is a frail human. This creates an interesting dynamic. There's also the 'cultural clash' trope. The vampire culture in Twilight is very different from human culture. The OC has to adapt to things like vampire traditions, hunting habits, and their view on human life. And don't forget the 'redemption' trope. Maybe Emmett has some past actions he needs to make up for through his relationship with the OC.
Another plot could be that the OC is an ancient being like Godric, but from a different part of the world. They meet in a chance encounter and discover that they have a shared past that dates back centuries. This revelation could set off a chain of events that affects the entire vampire community in the True Blood universe.
One popular trope is the 'opposites attract' concept. Since Killer Frost is often depicted as cold and aloof, a Fem OC can be warm and friendly, creating an interesting dynamic. Another is the 'power struggle' trope. If the Fem OC also has powers, there could be a competition or a need to combine powers to face a common enemy. And of course, the 'slow burn' romance is common, where their relationship gradually develops over time, starting from distrust or dislike to mutual understanding and love.
One common trope is the 'forbidden love' aspect. A vampire might fall in love with a human, and their need to drink blood creates a lot of tension in the relationship. Another is the 'vampire society' trope, where the story delves into the politics and hierarchies among vampires. Also, the 'vampire hunter' trope is popular, adding an element of danger and conflict as the hunter tries to stop the vampire from drinking blood.
First, the writer should give the OC a unique backstory. For example, if the OC is a human, they could have a past that somehow ties them to the vampire world, like a family member who was involved with vampires. This gives a reason for their connection to Godric. Second, the OC should have distinct personality traits. Maybe they're brave in the face of danger or have a strong sense of justice. This would contrast or complement Godric's own character.
One popular trope is the 'Powerful OC' trope. In many Goku x OC fanfictions, the OC is often created with unique powers that either complement or rival Goku's. Another is the 'Training Partner' trope, where the OC becomes Goku's training partner and through their training sessions, a relationship develops. And the 'Saved by Goku' trope is also common, where the OC is in some sort of danger and Goku comes to the rescue, which then leads to their relationship evolving.