Vlad could be the antagonist himself. Even though Danny is running to him, it could be that Vlad has some evil plan in motion. He might be using Danny's desperation to his advantage, like tricking Danny into doing something that would benefit him but harm Danny or the town.
It could be a human character who has a vendetta against both Danny and Vlad. Maybe this person has discovered their ghostly natures and wants to expose them or destroy them. Danny runs to Vlad not knowing that this human is also on his way to Vlad's place with some sort of weapon or device that could harm them both.
One possible plot could be that Danny discovers some new threat that is related to Vlad's past actions or secrets. So, he runs to Vlad to confront him about it, thinking that Vlad might have the key to solving the problem. Maybe it's a powerful ghostly artifact that was once in Vlad's possession and now it's endangering the town.
A group of human hunters who have decided to target Danny's ghost side could be the antagonists. They might be trying to capture Danny and use him for their own experiments. Danny, feeling violated and angry, decides to take revenge by using his ghost powers to outwit them at every turn, and expose their cruel intentions to the people of Amity Park.
A new and powerful ghost that Danny has never faced before could be the main antagonist. This ghost could have unique powers that Danny isn't prepared for, and in their first encounter, it manages to defeat and kill Danny. This would set the stage for a story of revenge or trying to bring Danny back.
In the 'danny phantom is a lion fanfiction', the main antagonist could be a group of anti - phantom scientists who capture Danny when he's in lion form. They want to study his unique physiology and use his powers for their own evil experiments. They see him as a threat to their control over the human - ghost interactions and will stop at nothing to keep him locked up and experiment on him.
A new, powerful ghost that hates the Christmas cheer could be the main antagonist. This ghost could be spreading gloom and trying to cancel Christmas in Amity Park. Danny would have to figure out the ghost's motives and stop it from ruining everyone's Christmas. For example, it might be a ghost who was once a Scrooge - like figure in life and now wants to make others as miserable as he was.
Sam and Tucker are often popular. Sam's strong - willed and gothic nature can add interesting dynamics. Tucker's tech - savvy skills can also play a role, like helping Danny and Vlad in some way when it comes to dealing with ghost - related technology.
I'm not very familiar with this specific 'danny phantom abusive vlad fanfiction'. But generally, in fanfiction, an 'abusive' aspect might involve one character treating another in a negative, often unethical or harmful way. In the context of Danny Phantom and Vlad, it could be about power dynamics, with Vlad perhaps using his abilities or position to mistreat Danny in the fictional story.
One aspect of Danny Phantom x Vlad fanfiction could be the exploration of their complex relationship. In the original series, they are adversaries with a lot of underlying tension. Fanfictions might focus on what would happen if they were forced to work together, perhaps in a situation where a greater threat emerges that requires both their powers. This could lead to interesting character developments as they learn more about each other.
Well, obviously Danny and Vlad are very popular. Danny is the main character in the show and in fanfiction, his adventures and growth are always a focus. His ability to balance his human life and his ghost - fighting duties makes him a complex and interesting character to write about.
Jazz, Danny's sister, is also a great addition. She's intelligent and often tries to understand Danny's situation. In a fanfiction, she could be the one to try and mediate between Danny and Vlad, or she could be suspicious of Vlad's intentions and try to protect Danny in her own way. Maybe she even teams up with Sam and Tucker to keep an eye on Vlad.