Well, clearly Damon is one of the main characters. He might be the one bringing in elements of mystery, power (if he has any special abilities in the context of the story). The OC, on the other hand, is the female lead who is going to be the mother of their baby. She could be someone with a unique personality, maybe she's strong - willed or very kind, and together they form the core of the story.
Well, one possible plot could be that Damon and the OC initially struggle with the idea of having a baby. Maybe they're not fully prepared, but as the story progresses, they start to embrace the new life coming. They could face challenges like how to balance their relationship with the new responsibilities of raising a child.
In the fanfiction, perhaps the baby's birth is a very difficult and dangerous process. Since both Bella and Damon are from different fictional universes with their own set of rules regarding vampires and such. The baby could be a symbol of a new beginning for their relationship, forcing them to put aside their differences and work together to protect their child. They may have to face challenges from both the vampire and human communities who are either afraid of or envious of the baby.
The baby might have Bella's big, expressive eyes and Damon's dark, tousled hair. Maybe it would inherit Bella's pale complexion and Damon's sharp facial features. Since they both have a certain allure in their respective shows, the baby could be extremely beautiful or handsome, with an otherworldly charm.
Well, perhaps the story could revolve around how their relationship changes with the new addition. They might struggle to balance their love for each other and their newfound parental responsibilities. For example, Damon's wild side might need to be tamed a bit more as he becomes a father, and Elena has to deal with the stress of being a mother in a world full of danger.
One possible plot could be that they initially struggle to adapt to parenthood. Bonnie might be worried about how her magic could affect the baby, and Damon would be overprotective. They could face challenges from the vampire and witch communities, but their love for each other and the baby would help them overcome difficulties.
Well, at first, they might be a bit clumsy in their new roles as parents. Damon, who is used to being a bit of a loner, would have to open up more to Bonnie and the baby. Bonnie would be more in control in some ways, as she would use her witch knowledge to take care of the baby. Their relationship would shift from just being a couple in love to a family unit, with all the added responsibilities and deeper emotional bonds that come with it.
Damon would likely become more protective and responsible. He might start to see the value in a more stable life. Elena would grow in her maternal instincts and become even more of a force to be reckoned with when it comes to protecting her family.
The baby could potentially have Naruto's chakra powers. Since Naruto has a vast amount of chakra and can access the Nine - Tails' power, the baby might inherit some of that. Maybe it could also have some unique abilities from the OC. For example, if the OC has a special type of jutsu related to nature manipulation, the baby could have a combined form of that and Naruto's powers.
Another author could be RoseRed. She often writes fanfictions that are full of action and adventure. In her Damon and Katherine baby fanfictions, she might create exciting plotlines where the baby is in the middle of some dangerous vampire battles. Her stories are fast - paced and keep you on the edge of your seat.