One possible plot twist could be that while Harry is sleeping, he has a prophetic dream that reveals a hidden danger in Hogwarts. Maybe he sees a dark magic entity emerging from the Forbidden Forest and approaching the castle while he sleeps. This could then lead to a race against time for him and his friends to figure out how to stop it once he wakes up.
Hermione might find him first. She would probably be worried at first, thinking that something was wrong with Harry. But then she would quickly realize that he might just be exhausted from all the recent events. She'd likely sit beside him and start reading a book, keeping an eye on him until he wakes up.
Sure. There are fanfictions that revolve around the Great Hall's architecture and its historical significance in the wizarding world. Some stories might explore how students interact with the magical elements of the Great Hall, like the floating candles or the enchanted ceiling. These fanfictions add depth to the world of 'Harry Potter' without any inappropriate content.
There could be a corrupt Hogwarts teacher who has been secretly practicing dark magic. This teacher, perhaps a Potions or Defense Against the Dark Arts teacher, has been influenced by the allure of power. They see Harry as a threat to their new - found power and decide to torture him in the Great Hall to send a message to the other students that they are in charge now.
It could be due to extreme exhaustion. Harry has been through a lot in his adventures. He might have been overusing his magic, perhaps in some secret training or in trying to protect Hogwarts from an unseen threat, and his body just couldn't take it anymore, causing him to faint right there in the Great Hall.
One popular theme is the Sorting Ceremony. Fanfictions often explore the emotions and experiences of new students during the Sorting in the Great Hall. Another theme is the feasts. Writers might describe in detail the delicious magical food served in the Great Hall during these feasts and the interactions between characters.
The sleeping spell in Harry Potter fanfiction often takes on different levels of potency. It could be a simple spell used by students in Hogwarts for a prank, like making a classmate doze off during a boring lecture. Or it could be a more dangerous version, used in battles where one wizard tries to incapacitate the enemy. In some fanfics, the spell's effectiveness might depend on the caster's magical strength and the target's resistance.
Hermione would likely be the first to rush to his side. She would immediately start using her knowledge of magic to try and figure out what was wrong with him. She might cast diagnostic spells and try to find a cure if it was something she could handle on her own.
In a fanfiction, the three of them could be in the Great Hall for a sorting ceremony that goes wrong. A new student's magic is so powerful that it disrupts the normal process. Harry, Hermione, and Ron step in to calm things down. Hermione uses her vast knowledge of magic to try and control the situation, Ron's loyalty and bravery encourage the other students not to panic, and Harry's natural leadership helps them come up with a plan to contain the new student's magic until the teachers arrive.
In a fanfic, Harry might be having trouble sleeping because he senses a new dark force approaching Hogwarts. He lies awake at night, listening for any strange noises. Ron tries to cheer him up by telling him funny stories from their previous adventures, but it doesn't really help. Eventually, they decide to explore the Forbidden Forest at night to find out what's causing his unease.