Well, the OC's hatred often becomes a central conflict. It might lead to situations where the OC tries to expose Elena's secrets to Damon or to the whole vampire community. This can cause a chain of events that changes the course of the story. Also, it could make Damon question his own feelings for both the OC and Elena. He might be forced to choose sides, or try to reconcile the two, which adds more twists to the plot. In some cases, the OC's hatred might even attract the attention of other characters who want to use this conflict for their own gain.
One example could be a story where the OC has a past encounter with Elena that makes her dislike her. Maybe Elena unknowingly hurt the OC's family in some way in the fanfic. Another example might be that the OC is a vampire hunter and Elena's vampire nature goes against the OC's beliefs, so she hates her. And in some fanfics, the OC could be in love with Damon and sees Elena as a rival for his affections.
The OC can also bring new relationships into Armin's life. This can create new conflicts or alliances. For instance, if the OC has a family member who is against the Scouts, it can cause tension between Armin and the OC, but also lead to interesting story developments as they try to resolve their differences.
The pregnancy can strengthen their relationship. They become more united as they face the challenges together. They have to rely on each other more, like Damon protecting Elena from any harm during her pregnancy and Elena relying on Damon for emotional support.
Damon's compulsion of Elena can completely change the trajectory of their relationship. It might make their relationship more passionate in some cases. For example, if he compels her to be more honest about her desires, it could lead to a more open and intense connection. However, it can also be a source of mistrust. If Elena discovers that Damon has compelled her without her knowledge, it could seriously damage their relationship and take a long time to repair.
Well, when Damon tells Elena he loves her in fanfiction, it has a multi - faceted effect on the plot. For starters, it can create a ripple effect among other characters. If there are characters who have feelings for either Damon or Elena, this declaration can lead to jealousy or attempts to break them up. It can also shift the power dynamics within the story. For instance, if Elena was previously in a more dominant position in their relationship, Damon's love declaration might change that. Additionally, it can inspire the writer to explore themes like sacrifice. Maybe Damon is willing to sacrifice something for Elena now that he has declared his love, and this can form the core of new plot developments.
It could be that the OC creator simply doesn't like the typical tropes or storylines often found in Rias fanfiction. For example, if the fanfictions tend to be very formulaic or over - use certain clichés, the OC might be a symbol of a break from that. Also, perhaps the OC has a specific backstory or purpose that is at odds with the general narrative of Rias fanfiction.
Their relationship becomes more serious and committed. With a baby on the way, they have to think about more than just themselves.
A common theme is the forbidden love aspect. Since Damon has his own complex history and often behaves in a morally ambiguous way, a relationship with an OC is often portrayed as something that goes against the norm or is difficult to accept. Another theme is redemption. The OC might be the catalyst for Damon to seek some form of redemption in his life.
Elena might be heartbroken. She probably expected Damon to always be there for her, so his choice of Bonnie would come as a shock.
Elena might show her jealousy by being overly critical of Bella. For example, she could constantly find fault in Bella's actions or decisions in the fanfiction.