Who could be the main antagonist in Kyman vampire fanfiction?

Perhaps Cartman, as a vampire, turns Kyle into a vampire against his will. Kyle then has to deal with his newfound vampiric nature while still trying to hold onto his moral compass. This could lead to a lot of internal conflict and interesting character development.

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.

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.

Another option is a powerful vampire coven leader who wants to use Jacob for his own purposes. When Jacob refuses, the coven leader turns against him and becomes the main source of conflict in the fanfiction.

A powerful elder vampire who opposes the prince's ideas of change within the vampire community. This elder might see the prince as a threat to the traditional vampire ways and will stop at nothing to undermine him.

Maybe a witch who has a vendetta against vampires in general. She could use her magic to cause all sorts of trouble for Edward, like casting spells that prevent him from using his vampire abilities or even creating illusions to drive him mad. Since she's a witch, she has different powers compared to a normal vampire hunter, so she'd be a very formidable antagonist. She might also be able to manipulate other humans or vampires to do her bidding in her quest to get rid of Edward.

Maybe Voldemort or his followers could still be antagonists. Even though Harry is now a vampire, Voldemort might want to use his new state for his own evil purposes or simply view Harry as a nuisance that must be destroyed. Since Harry has changed, he might have new weaknesses that Voldemort could exploit.

It could be an old vampire who sees Elena as a threat to his power or territory. Maybe he doesn't like the idea of a newly - turned vampire causing a stir in the vampire community and decides to take her out.

It could be a powerful vampire hunter who believes Naruto, as a new vampire, is a threat to the balance between humans and vampires. This hunter might be from a long line of slayers and is determined to eliminate Naruto before he fully embraces his vampire side.

Another possibility is a vampire who wants to use Ethan for his own gain. He might try to manipulate Ethan into doing things that are against his will. This vampire could be part of a powerful vampire clan and wants Ethan to be his puppet so that he can gain more power within the clan.