Serana is an obvious choice. As a vampire herself, she could have a complex relationship with the male vampire dragonborn. They could either be rivals, competing for power within the vampire world, or they could become allies, sharing their knowledge of vampiric powers and dragon shouts. Another character could be Vilkas from the Companions. He might initially be hostile towards the vampire dragonborn but later come to respect him as they fight together against a common enemy, like a powerful dragon or a group of necromancers.
Well, the allure lies in the unique combination of two very powerful and distinct identities. The Dragonborn is already a sort of chosen one with great power, and adding the vampire element just amps up the cool factor. It can create stories full of moral dilemmas, like whether to embrace the vampiric side for more power or resist it to stay 'good'.
A plot could center around the Dragonborn Vampire Lord's search for a cure. He might hear rumors of a powerful artifact or a wise mage who can reverse his vampirism. Along the way, he meets other vampires who either try to persuade him to embrace his new life or are jealous of his power. He also has to deal with the normal threats in Skyrim like dragons and bandits while trying to keep his vampiric nature a secret from those who would hunt him.
One great fanfiction idea could be the Dragonborn Vampire Lord's struggle to maintain his humanity while dealing with the thirst for blood. He might have to make tough choices between using his vampiric powers for good or succumbing to the dark desires that come with being a Vampire Lord.
One idea could be that the male vampire dragonborn struggles with his dual nature. He has the power of the dragonborn but also the thirst for blood as a vampire. For example, he might face a moral dilemma when using his dragon shouts to save a village that is afraid of his vampiric side. Another plot could involve him seeking a cure for his vampirism while still trying to fulfill his destiny as the dragonborn. He could travel to ancient ruins in search of a lost spell or artifact that might reverse his condition.
One great fanfiction idea could be a Vampire Dragonborn who struggles to control their bloodlust while on a quest to save Skyrim. They might face unique challenges as both a vampire and a Dragonborn, like being shunned by some townsfolk but still having to use their dragon powers to defeat powerful foes.
Farkas from the Companions would be an interesting character to pair with the Dragonborn OC. He's a strong warrior and has a simple - minded but kind nature. The OC could learn a lot from him about combat and the ways of the Companions. Also, Brynjolf from the Thieves Guild could be paired with the OC. If the OC has a bit of a roguish side, they could get into all sorts of mischief together in Riften and across Skyrim.
Some great skyrim oc dragonborn fanfiction involve crossovers. For example, a crossover with another fantasy world where the Dragonborn has to adapt to new rules and magic systems. Also, stories that give the Dragonborn a different set of powers or abilities not seen in the game can be really interesting. These can include things like the ability to communicate with all animals, not just dragons.
The theme of isolation is also quite prevalent. In Skyrim, being a vampire is not always accepted, and as a dragonborn, they are set apart already. So, they often face loneliness. Also, redemption is a theme in some fanfictions. The vampire dragonborn may try to atone for their vampiric deeds while still using their powers for good in Skyrim.
There's also 'A Vampire's Tale in Skyrim'. This fanfiction delves deep into the world of Skyrim as seen through the eyes of a vampire dragonborn. It explores how their vampiric abilities interact with their dragonborn powers. For example, their enhanced senses as a vampire can sometimes be a hindrance when trying to use dragon shouts. It's a really interesting read.
Some fanfictions focus on a romantic relationship between the two. They might share tender moments during their travels. For instance, while camping under the stars, they could exchange stories about their pasts. The Dragonborn could talk about her life before becoming the Dragonborn, and Serana could share her memories of her family and how she became a vampire. These moments of vulnerability could lead to a deeper connection and eventually a romantic relationship, which then becomes the central theme of the fanfiction, with them facing all kinds of challenges as a couple in the world of Skyrim.