Who could be the main villain in a 'Harry and Ginny child from the future' fanfiction?

One possible plot could be that the child from the future comes back to prevent a great disaster. Maybe a dark wizard in their future time has found a way to rewrite history and the child has to make sure Harry and Ginny meet and fall in love at the right time. The child might also have some special powers inherited from their parents which they use to face various challenges in the past.

One option could be time - travelers from a different future. Maybe there are some wizards from a parallel future who want to change the past to suit their own needs. They might be opposed to Harry and Ginny's kids because they are trying to protect the original timeline. These antagonists could use some really complex time - magic to try and outwit the kids.

Maybe the main villain could be a corrupted Hogwarts professor. This professor could be secretly teaching dark magic to students and when Harry's child discovers this, they become the target. The professor wants to stop the child from revealing their dark secrets and will go to great lengths to do so, making them a formidable villain in the fanfiction.

Hermione Granger - Weasley is also quite popular. She's smart and resourceful, and in fanfictions related to the Cursed Child, she might use her vast knowledge of magic to help Harry and Ginny deal with the aftermath of the Cursed Child events. Ron Weasley is another character that features prominently. His humorous nature and his loyalty to his friends can add some light - hearted moments to the often - dark themes associated with the Cursed Child in fanfiction.

Well, one possibility could be that the kids from the future come back to prevent a great disaster in the present. Maybe a dark wizard that was defeated in their time has somehow found a way to be reborn in the past (the present in the story), and they need to stop it before it's too late.

It could be a new dark wizard that they see in the future. Maybe someone who was overlooked during the fight against Voldemort but has been secretly gathering power.

A powerful sorcerer could be the main villain. This sorcerer has the ability to control minds and is using it to turn some of the Huntsmen and Huntresses against their comrades. He aims to take over Remnant and rule with an iron fist.

The remnants of Voldemort's followers could still be a threat. They might see the third child as a symbol of the new hope in the wizarding world that they want to destroy. Maybe they believe that the child has some sort of power that could ultimately be used to completely wipe out their dark ideology, so they target the child.

Well, perhaps they will discover that magic has merged with Muggle technology in the future. Harry and Ginny could be amazed to find flying cars that are powered by both magic and electricity. They may also encounter new forms of dark magic that they have to fight against, or they might see a future where the wizarding world has achieved complete peace and harmony, and they play an important part in maintaining that peace.

The main villain could be an older and more powerful version of Vlad. Maybe he has finally perfected his cloning techniques and created an army of half - ghost clones. He could be more devious and have a grand plan to take over both the human and ghost worlds.