A common theme is the exploration of power dynamics. Since Eric is often portrayed as a powerful figure in the Divergent world, the fanfiction often shows how this affects his relationship with the reader. Another theme is loyalty, whether it's loyalty to the faction or to each other.
One common theme is the power struggle. Eric is often associated with power in the Divergent world, and when an OC is introduced, there's a dynamic of power sharing or challenging. For example, the OC might question Eric's authority in Dauntless.
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.
One common theme is the idea of forbidden love. Since Eric is often portrayed as a strict and rule - following character in the Divergent world, falling in love with someone who might not be 'approved' of by the faction system is a popular concept. For example, he could fall for someone from a rival faction.
There's this great 'eric x reader divergent fanfiction' called 'Love in the Factionless'. It imagines a scenario where the reader and Eric find themselves among the factionless and how their relationship blossoms in such a difficult situation. The author does a wonderful job of portraying their emotions and the challenges they face.
Friendship is often a common theme. The stories might explore how Eric and Alan's relationship develops from being just acquaintances to really close friends. Maybe they go through some challenges together that strengthen their bond.
Another common theme is growth. They might start as two individuals with different views but as the story progresses, they grow together, both personally and in their relationship. For example, in some fanfictions, they learn to communicate better with each other which helps them face challenges more effectively.
Often, loyalty is a big theme. Eric and Ronald might be in situations where they have to prove their loyalty to each other. And sometimes, there are themes of adventure where they face challenges together and their relationship deepens as a result. For instance, they could be on a quest to save their town or something similar, and through that, their bond becomes stronger.
One common theme is the exploration of forbidden love. Since Eric has a rather antagonistic role in the original story, the idea of him and Tris getting together goes against the norm. Another theme is redemption. Eric might be seen as trying to redeem himself in Tris's eyes. And there's also the theme of power dynamics as they both come from different positions of power within the factions.
Friendship is a very common theme. Writers often explore how Eric and William become friends, support each other, and grow together.
Love and loyalty are common themes. Their relationship is often tested, but they remain loyal to each other in many stories. For example, in some fanfics, Sookie has to choose between Eric and her human friends, and her loyalty to Eric shines through.