Who could be the main antagonist in 'hermione becomes a vampire fanfiction'?

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 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 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.

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.

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.

An old - fashioned pure - blood wizard who doesn't like Hermione's Muggle - born status. He sees her as an outsider and wants to make her life difficult at Hogwarts. He uses a charm that causes water to seep through her clothes whenever she enters certain areas of the castle. This is his way of trying to drive her out of Hogwarts.

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.

Another possibility is a dark wizard or a group of dark wizards who are after some powerful magic that the Lestrange family has, and Hermione gets in their way as she tries to protect the family or uncover the secrets. They would be the main force that Hermione has to face and overcome throughout the fanfiction.

Perhaps a powerful magical being from a different realm is the antagonist. This being might mistake Hermione for someone else or see her as a key to something in the wizarding world. So, it uses its magic to make her disappear. This being would be very difficult to defeat or negotiate with, making it a huge challenge for those trying to find Hermione.

Well, perhaps the plot could involve Hermione being bitten by a vampire during one of her adventures. Then she has to deal with her newfound vampiric nature while still trying to maintain her relationships with Harry and Ron. She might struggle with her thirst for blood and her moral code as a witch.