Power is a common theme. Eric is a powerful vampire, and many fanfics explore how he wields that power, whether for good or bad. Another theme is love. His relationships, be it romantic or platonic, are often a central focus. For example, his relationship with Sookie is often re - imagined in different ways in fanfics.
Well, immortality is a theme that often comes up. Eric's immortality gives him a different perspective on life and relationships. Fanfics may explore how he deals with the passage of time and the changing world around him. Another common theme is the struggle between his vampire nature and his human - like emotions. He has to balance his bloodlust and his more tender feelings, and this is a rich area for fanfic writers to explore.
One common theme is love. Many fanfictions explore Eric's romantic relationships, whether it's a new love interest or his relationship with existing characters from the original story.
One of the main themes is the allure of the dark. In these fanfictions, Eric's dark persona is something that both attracts and terrifies the other characters. His immortality and the way it has shaped his dark view of the world is also a common theme. For example, in some stories, his long years have made him cynical and more likely to embrace his darker impulses. Also, the theme of revenge can be found in many dark Eric Northman fanfictions. If someone wrongs him, his dark side will seek vengeance without mercy.
One common theme is love and attraction. Since Eric Northman is such a charismatic character, often the OC will fall for him or there will be a complex love triangle. Another theme is power struggles. With Eric being a powerful vampire, the OC might get caught up in the power dynamics within the vampire community.
Often, you'll find the theme of power and control. Eric is a powerful vampire in his own right, and Bella has her own kind of power, whether it's her connection to the Twilight vampires or her own inner strength. Their relationship often explores how they balance power within the story. Also, the theme of loyalty comes up a lot. They both have loyalties to different groups or individuals, and how they navigate those loyalties when they are together is a big part of the fanfictions.
A common theme is the clash of different cultures. Harry Potter comes from a world of magic with its own set of rules and values, while Eric Northman is from the vampire world in True Blood. Fanfictions often explore how these two different cultures interact.
One common theme is the supernatural. Since Eric is a vampire, there are often elements of the supernatural world like vampire politics, powers, and the co - existence with humans. Another theme is love against all odds. The reader character usually has to overcome many obstacles, like Eric's vampire nature or external threats, to be with him.
The themes often revolve around the transformation of Bella. As Eric is her maker, her physical and mental transformation is a big part of it. Also, the theme of protection is common, as Eric might feel a strong need to protect his creation, Bella. And there's always the underlying theme of how their relationship impacts the wider vampire community, whether it causes jealousy, suspicion or new alliances.
The theme of redemption also pops up a lot. Eric, with his long and sometimes dark past, often seeks redemption through his relationship with Sookie. This can be seen in various fanfictions where he tries to make amends for his past actions to be worthy of Sookie's love.
One great Eric Northman OC fanfic is 'A New Beginning'. It has an interesting original character who interacts with Eric in a unique way. The plot is full of twists and turns that keep you hooked.
In my opinion, a great Eric Northman x Reader fanfic should have a believable relationship dynamic. Since Eric is a complex vampire character, the fic should show how the reader navigates his world. It should also include elements that are true to the 'True Blood' universe, like the vampire politics and the other supernatural elements. This makes the story feel more immersive. For instance, a fic where the reader has to deal with Eric's enemies in the vampire hierarchy can be really interesting. The fanfic should also have good pacing. If it's too slow, readers might lose interest, but if it's too fast, the relationship between Eric and the reader won't seem genuine.