Elena is often paired with Elijah in fanfiction. Their relationship in the show was complex and in fanfiction, authors explore different aspects of it, like a romantic relationship that could have been. Another character is Katherine. Since she has a long history with the vampires in the show, she also makes an interesting pairing with Elijah in fanfiction.
One common antagonist could be Klaus. He has his own motives and often clashes with Elijah. His presence can create a lot of tension between Elijah and Elena as well, since he might target Elena to get to Elijah or vice versa.
Luigi is often paired with Vampire Waluigi in fanfiction. Since they are counterparts in the original Mario universe, it creates an interesting dynamic in the vampire - themed stories.
Armand is also a character that might be paired with others. For instance, he could be paired with a new, original male character created in the fanfiction. Armand's long history and his own brand of vampiric allure can make for an exciting relationship when combined with another male character, whether it's a fellow vampire or a human turned vampire.
A fanfiction could explore the idea that Elijah's desire for Elena is part of a bigger prophecy. Maybe there's a hidden message that says if Elijah and Elena are together, it will bring peace to the vampire and human world. So he's driven by this sense of duty as well as his personal feelings for her. This would lead to a lot of internal conflict for Elijah as he tries to balance his feelings with the potential consequences of their relationship.
One idea could be that Elijah tries to court Elena in a very old - fashioned and gentlemanly way. He might take her on trips to historical places he has known over the centuries, sharing his stories and knowledge with her. This would be a contrast to the other vampires' more aggressive approaches towards Elena.
One common theme is rivalry turned friendship. They start off as enemies but over time, in many fanfics, they learn to respect and even rely on each other.
There's a fanfic called 'Elijah's Redemption through Damon'. This one dives deep into Elijah's character development with Damon as an unexpected catalyst. It shows a different side of their relationship, more of a mentor - mentee kind of bond at times.
Often, a young and brave hero might be paired with Lady Black. This hero could be someone who is still learning about their powers and looks up to Lady Black for guidance.
In some Black Queen fanfiction, the Prince of Shadows is frequently paired with her. Their relationship can be complex, perhaps they are rivals at first but then find common ground. There's also the Enchantress. Since both are female characters with great power, their interactions can range from intense competition to unexpected alliances. And don't forget the Lone Wanderer, who might be drawn into the Black Queen's orbit and become an important part of her story.
One character often paired with Tyrian could be Cinder. Since they are both villains in RWBY, they might be grouped together in fanfiction to carry out some devious plans. Their combined powers and personalities can create some interesting dynamics.