Well, it's a wild fanfiction concept. Fanfic writers might play with the idea by having some sort of magical mix - up or a different relationship path for Hermione. Maybe there's a spell gone wrong that leads to this unexpected pregnancy. But it would surely be a huge departure from the original story's themes and relationships.
Draco Malfoy could be a likely antagonist. He might be jealous of the friendship or whatever relationship is developing between Fred and Hermione and try to cause trouble for them. Another could be some of the more strict professors who don't approve of their unorthodox ways of doing things.
Well, perhaps in this fanfiction, Fred and Hermione could be paired up for a special assignment by a professor. They start off not getting along because of their different personalities, but as they work together, they realize they have more in common than they thought. For example, they both have a strong sense of loyalty, Fred to his family and Hermione to her friends. They could end up using their combined skills to save a part of Hogwarts from a magical threat.
One way could be through a time - travel plot. Maybe Hermione travels back in time and ends up in a relationship with Fred instead of Ron, and then the pregnancy occurs. Another option is a magical accident where a spell affects their emotions and actions towards each other, leading to the situation.
Fred could use his knowledge of the Weasley family's magic tricks and inventions. He might have some secret gadget or spell that can break through the barriers or spells that are being used to torture Hermione.
In many fanfictions, a plot where Hermione is pregnant at Hogwarts can bring a whole new set of challenges and storylines. It might involve how she manages her studies while dealing with the physical and emotional changes of pregnancy. Also, it could explore how her friends, like Harry and Ron, react to this unexpected situation.
One possible fanfiction could be where Fred and Hermione discover their Animagus forms together. Maybe they transform in the Forbidden Forest and have to rely on each other to get back to Hogwarts safely. Their forms could be something that represents their personalities, like Fred could be a fox, known for its cleverness and playfulness, and Hermione could be an owl, symbolizing wisdom.
Well, in some versions, Fred might use his quick-witted magic skills. He could cast a distraction spell to draw Bellatrix's attention away from Hermione. Maybe a spell that creates multiple illusions of himself, confusing Bellatrix long enough for him to grab Hermione and disapparate them to safety.
One reason could be that they played a particularly mischievous prank on her that went too far. For example, if they made her late for an important exam or meeting with a professor by using one of their wild magical inventions. Hermione, being a stickler for rules and academic achievement, might lose her temper and hex them in retaliation.
Yes, there are. For example, some fanfictions might have a twist where Fred doesn't actually die but is instead in a magically induced coma. The characters then have to find a way to wake him up, and it's a race against time. This kind of plot twist can add a whole new layer of excitement and hope to what is otherwise a very tragic event in the original story.