Who could be the main antagonist in a Naruto - turned - into - a - vampire fanfiction?

It could be Orochimaru. He might see Naruto's new form as an interesting experiment or a threat to his plans. He could try to capture Naruto to study her newfound female - related powers or use her in some dark jutsu.

It could be a powerful vampire lord who sees the hybrid as an abomination and wants to destroy them. This vampire lord might view the mixing of werewolf and vampire blood as a threat to the purity of the vampire race.

Perhaps a group of vampires who are trying to take over the entire Rosario Vampire world and are causing harm to both humans and other supernatural beings. Naruto views their actions as unacceptable and makes it his mission to banish them. They could be very strong and have some special abilities that make them a formidable foe for Naruto.

It could be another vampire clan. They might see Cartman and Kyle's relationship as a threat to their own power or way of life. For example, if Cartman and Kyle are trying to promote co - existence between vampires and humans, the other clan might oppose it.

The main antagonist could be the one who turned Percy into a monster in the first place. Maybe it's a vengeful god who feels Percy has wronged them in some way and decides to punish him by turning him into a fearsome beast.

Perhaps a half - alien, half - vampire hybrid. This character was shunned by both species and blames Ben for making him feel even more like an outcast. He uses his unique powers to create chaos and tries to turn Ben into a vampire - alien like himself.

Perhaps a powerful vampire lord who sees Sookie as a threat to his power. Since she was once human and has connections to both worlds, he might fear that she could rally other vampires and humans against him. He could try to eliminate her by any means necessary, leading to a lot of action - packed scenes in the fanfiction.

It could be an old and powerful vampire who sees Hermione as a threat to his rule. Since Hermione is a very intelligent witch - now vampire - she might be able to figure out a way to undermine his power.

It could be an old and powerful vampire lord who sees Natsu as a threat to his rule. Since Natsu is a new and different kind of vampire, the lord might want to eliminate him.

Maybe the main antagonist is a scientist who has been experimenting with vampire-like powers and accidentally creates a powerful vampire - like monster. This monster then starts attacking the world, and Shadow, as a new vampire - hedgehog, has to stop it. The scientist might also be trying to cover up his mistake and will stop at nothing to keep Shadow from interfering.