inside hogwarts express

I don't think it's a common theme. The Hogwarts Express is often a setting for stories about students going to Hogwarts, their first encounters, and the start of their magical adventures. While there may be some outlier fanfictions that explore other themes, the idea of 'lemon' (if we're talking about adult - like content) being dominant seems very uncharacteristic of the general body of Hogwarts Express fanfiction.

Well, 'lemon' in fanfiction often refers to a type of romantic or sexual content (though it's not appropriate in all contexts). In this case, if it's 'dominated' on Hogwarts Express fanfiction, it might mean that this kind of content is prevalent in those fanfictions set on the Hogwarts Express. But it could also be some sort of citrus - themed or yellow - colored dominance in a more innocent sense if the author is using 'lemon' in a non - traditional way.

The characters included the male lead, Dumbledore, and the orcs were all the same! Male protagonist-Nick Flamel, I am the orthodox human! Male protagonist-Gellert Grindelwald, me too! The male lead was Alexander Alex, the consciousness of the human race. As long as the human race is not destroyed, I will not be destroyed. The male supporting role was Professor Kettleburn, the good friend of the monsters. The female supporting role was Winnie Purda VIII, praising the Holy Light! "Hogwarts: A foreign world is sealed in my body" by Anzinurgon. It was a light novel/derivative doujinshi novel with a cautious element. [User recommendation: I am the gate to another world.] Humans in the other world always seek death Aliens from other worlds are always restless Unable to stop the humans from seeking death, unable to stop the Outsiders from rebelling, I could only seek help from the strongest combat force on Earth. Dumbledore! Don't look at that stupid Voldemort! Come and save the real world! …… Voldemort's resurrection felt too easy... The Hogwarts army, wearing the divine equipment made of materials from another world, gave the whole earth a surprise. I hope you will like this book.

One reason could be that he was under a dark spell cast by a new enemy in the fanfiction. Maybe some dark wizard or witch sent a spell his way before he boarded the train, and it took effect during the journey.

Maybe a jealous student from Slytherin who wants to get back at Harry Potter and his friends. This student discovers a dark and forbidden spell that creates a bondage effect. They start using it on the Hogwarts Express to cause chaos and make Harry and his friends look bad. They see themselves as an antagonist because they feel wronged by Harry and his group in some way, and this is their way of getting revenge.