Who could be the main antagonist in a 'Harry Potter x Troll Market' fanfic?
A powerful dark wizard who has infiltrated the Troll Market and is using it as a base to gather dark magic items. He could be after the Elder Wand or some other powerful artifact from the Harry Potter universe and is using the chaos and secrecy of the Troll Market to his advantage. He would see Harry Potter as a threat to his plans and try to eliminate him.
A corrupt troll leader in the Troll Market. This troll could be making deals with dark forces from both the Troll Market and the wizarding world. He might oppose Harry Potter because Harry is trying to bring some order and stop the illegal trading of dangerous magical objects in the market. The troll leader doesn't want to lose his power and wealth that comes from the shady deals.
What could be an interesting plot for a 'Harry Potter x Troll Market' fanfic?
One possible plot could be that Harry Potter, while on a mission for the Order of the Phoenix, accidentally stumbles into the Troll Market. There, he discovers a magical artifact that Voldemort is also seeking. With the help of some of the unique creatures in the Troll Market, like the goblins or trolls who have their own brand of magic, Harry has to outwit Voldemort's followers who are also searching for the artifact.
Who could be the main antagonist in a 'Harry Potter x Aslan fanfic'?
It could be a new dark wizard who has somehow tapped into the power of both the wizarding world and the Narnian magic in a negative way. This wizard might want to rule both realms and is using dark magic from both to achieve his goals.
Who could be the main antagonist in a 'Harry Potter x Alice Cullen fanfic'?
Voldemort could be the main antagonist. He might see Alice's vampire abilities as a threat and want to use Harry to get to her. He could also be interested in using her powers for his own dark purposes.
Who could be the main antagonist in 'Bucky Barnes Punches a Troll Fanfic' other than the troll?
It could be the person or group who sent the troll. Maybe there's a mastermind behind the troll's actions, like a villain who wants to distract Bucky from something important. So while the troll is the immediate target of Bucky's punch, the real enemy is the one pulling the strings.
Who could be the main antagonist in a 'Harry Potter in Skyrim fanfic'?
The main antagonist could be a powerful necromancer who combines the dark arts of Skyrim with some elements of Voldemort - like magic. He could be raising an army of the undead and causing chaos across Skyrim, which Harry has to stop.
Who could be the main antagonist in a 'Harry Potter not eating' fanfic?
It could be a new dark wizard who has a vendetta against Harry. This wizard might use a spell to stop Harry from eating, thinking it will weaken him before a final showdown. He could be someone who was once a follower of Voldemort and now wants to take his place and prove himself by getting rid of Harry.
Who could be the main antagonist in a Harry Potter summoner fanfic?
Maybe an ancient evil spirit that was once bound but is now trying to break free by using the summoner as a conduit. This spirit could be manipulating events from the shadows, causing chaos in the wizarding world to draw the summoner out.
Who would be the main antagonist in a 'Harry Potter x Hisoka' fanfic?
There could be a new character created specifically for the fanfic. A dark wizard who has been observing the wizarding world from the shadows and sees Hisoka's arrival as an opportunity. This new antagonist could try to use Hisoka to achieve his own evil goals, like opening a portal to a dark dimension or stealing all the magic in the world. When Hisoka realizes he's being used, he would turn against this new antagonist, and Harry Potter and his friends would join him in the fight.
Who could be the main antagonist in a 'Harry Potter x The Mummy' fanfiction?
The mummy itself could be the main antagonist. It could be a mummy that was once an evil sorcerer in ancient Egypt, and now that it has been awakened, it wants to spread its dark magic and rule over both the Muggle and wizarding worlds.
Who could be the main antagonist in 'harry potter x slenderman fanfiction'?
Obviously, Slenderman could be the main antagonist. His spooky nature and his ability to cause fear and disappearances would make him a perfect fit for the role. He could be trying to spread his influence over the wizarding world, which would put him in direct conflict with Harry and his friends.