One idea could be that Selene finds herself magically transported to the wizarding world of Harry Potter. She might initially be confused but then use her skills as a vampire to help in some sort of battle against dark wizards. For example, her enhanced speed and strength could give the Order of the Phoenix an edge in a fight.
One possible fanfiction could be that Selene and Michael's pregnancy is a sign of hope for the vampire and lycan clans. Their child could be seen as a symbol of unity, bringing an end to the long - standing feud. Maybe in the story, they have to face many challenges during the pregnancy, like threats from those who oppose the union of a vampire and a lycan.
A common theme is the relationship between Selene and the OC. It could be a friendship, a mentorship, or even a romantic relationship. For example, the OC might be a new vampire that Selene takes under her wing.
There could also be original characters created specifically for the fanfiction. These characters could be hybrids of the Naruto and Selene universes, perhaps having a mix of ninja abilities and Underworld powers. They could add new dimensions to the story and help drive the plot forward, whether as friends or foes to Naruto and Selene.
First, you need to understand the Underworld universe. Know the rules about vampires, werewolves, and the whole power dynamic. For the OC, create a unique backstory. Maybe they're a human with a special connection to the supernatural world. Then, think about how Selene would react to this new character. Their first meeting should be impactful and set the tone for their relationship.
Another way it could work is through a character's quest. Let's say a character in the Harry Potter world is searching for a way to defeat a new kind of dark magic that has some similarities to the dark forces in Selene's world. They travel to find Selene, and together they combine their knowledge and skills. Selene's knowledge of the underworld's dark secrets and Harry's understanding of magic could create a unique way to fight this new threat.
First, you need to understand the characters. Selene is a strong, complex vampire, so you should keep her personality traits consistent. For the male reader character, decide on his background, whether he's human, vampire, or something else. Then, create a plot that brings them together. Maybe it's a shared mission or an accidental encounter.
Some fanfictions could explore the idea of Selene teaching Naruto about the secrets of the Underworld. Naruto, in turn, could show Selene his ninja way and how determination and hard work can overcome great obstacles. This could lead to a series of adventures as they explore different regions of the Underworld together.
One great Underworld: Selene x OC fanfiction is 'Selene's New Ally'. It has an interesting plot where the OC is a vampire hunter turned vampire, and their relationship with Selene is full of tension and mutual discovery. It really delves into the Underworld lore while creating a unique bond between the two characters.
Well, Naruto's Nine - Tails chakra is a huge power source. If he were to share some of that chakra with Selene, she could gain new abilities. Maybe she could use it to create a powerful shield around them, since the Nine - Tails' chakra is known for its raw power. On the other hand, Selene's power to control the blood of her enemies could be used to immobilize opponents while Naruto prepares his more complex jutsus. Their combined powers would be a very interesting and powerful mix that could be used to overcome many difficult challenges in the Underworld.