Most likely, Harry Potter remains the main character. After all, it's a 'Harry Potter' fanfic. He would be the one to take on the challenges presented by the Nightmare Lord.
Harry Potter could also be considered the most powerful. He has a lot of experience facing dark forces and his own inner strength. In fanfictions, he might gain new powers or skills to combat the Nightmare Lord. For example, he could learn a powerful spell specifically designed to counter the Nightmare Lord's abilities.
One interesting plot could be the Nightmare Lord creating new and terrifying dark creatures that Harry and his friends have to face. These creatures might have unique powers that challenge the heroes in ways they haven't experienced before.
Another possible main character could be a new student at Hogwarts who has a special talent for cooking. This student could be from a family of muggles who owned a restaurant. They bring their non - magical cooking knowledge combined with magic to try and turn the kitchen nightmare around. They would interact with the well - known Harry Potter characters and together they would work on solving the kitchen issues.
Perhaps Hermione could be one of the main characters. Given her intelligence and knowledge of magic, she might be the one to figure out how to deal with the strange 'Lord of the Wind' magic that has entered the wizarding world. She could be researching ancient spells and texts to find a solution.
Obviously, Harry Potter himself is a main character. Since he is becoming Lord Potter, he is at the center of the story. Hermione and Ron are likely to be important characters as well, as they are Harry's closest friends and will surely be involved in his new journey as Lord Potter.
Well, the main character is Harry Potter. In these fanfictions, he is often given the title 'Lightning Lord' which implies that he has some sort of special connection or power related to lightning. This new aspect of his character then drives the plot in different and often exciting directions compared to the original Harry Potter series.
Unsettling plot twists can contribute to a fanfic being a 'nightmare' type. For example, if it turns out that Dumbledore was actually an evil mastermind all along and has been manipulating Harry for his own dark purposes. Or if the prophecy was a lie and Harry's whole life has been a cruel joke. These kinds of revelations that shatter our perception of the original story can make a fanfic feel like a nightmare.
One interesting 'Harry Potter Nightmare Lord' fanfiction could be one where the Nightmare Lord is a new dark threat that Harry has to face instead of Voldemort. It might involve new magical creatures and spells.
In the 'Harry Potter nightmare man fanfiction', the 'nightmare man' could be a figure born out of the dark magic that has seeped into the wizarding world over time. He might not be a traditional wizard but more of a shadowy being. His identity could be a mystery at first, and as the story unfolds, we learn that he was once a normal wizard who was corrupted by a powerful and evil force. He then uses his new - found dark abilities to torment the characters we know from the Harry Potter series.
It could be a dark wizard who wants to use the power of magical creatures for his own evil purposes. He might be trying to control them, or use their parts for dark magic spells. For example, he could be after the horns of unicorns to make a potion that gives him immortality.