They are popular because it shows Hermione in a vulnerable state. Usually, she's so strong and in control, but when she's sick, it's a new side of her.
These fanfics are popular as they allow for a lot of character development. When Hermione gets sick, other characters get a chance to step up and show their caring side. For instance, Ron and Harry might have to take on more of Hermione's usual tasks, which creates interesting storylines. Also, readers get to see how the wizarding world deals with illness, which is different from the Muggle world.
The popularity might also stem from the fact that it adds a bit of realism to the magical world. Even in a world of magic, people can get sick. And seeing how Hermione, one of the most beloved characters, copes with being sick makes for an engaging read. It can also explore themes of friendship and support as her friends come to her aid during her illness.
They're popular because it shows a different side of Harry. Usually, he's seen as the hero, but when he's sick, he's vulnerable. People like to see how the other characters react to this vulnerable Harry.
The 'inuyasha gets sick' trope is popular because it gives the characters a chance to show their caring sides. Kagome, in particular, gets to be more of a caretaker. It deepens their relationships and shows the bond between them. Also, it can be a source of drama and tension, as the other characters worry about Inuyasha's survival and what will happen if he doesn't get better soon.
There's a fanfic titled 'When Hermione Falls Ill'. In this story, it focuses on Hermione's internal struggle while being sick. She's not used to being incapacitated and it delves into her thoughts and how she copes. It's really interesting as it gives a deep look into her character even when she's not at her best. For example, she tries to continue her studies while sick but her body just won't allow it.
They are popular because they show a different side of Twilight. Usually, she is seen as the smart, in - control character. When she's sick, she becomes vulnerable, and readers like to see how she and her friends handle this new situation.
I'm not sure if it's a popular fanfic. It might not be well - known to a wide audience because not everyone is into the Hermione and Prewett pairing. It could be a niche fanfic that only appeals to those who really like exploring that particular relationship within the fandom.
It's also because of the 'forbidden love' aspect. In the original Harry Potter series, they are on opposite sides. Fanfic writers like to explore what could happen if they overcame those barriers. They can rewrite the narrative and create a whole new story where Hermione and Draco find common ground, which is exciting for readers who want to see something different from the canon. Additionally, it gives more room for character exploration as they are both complex characters with a lot of potential for growth in these alternative storylines.
They're popular because it's an unexpected pairing. Hermione is a studious and brave Gryffindor, while Malfoy is a haughty Slytherin. People are drawn to seeing how two such different characters could interact and potentially fall in love.
Also, it gives fans a chance to see more of Bellatrix's character in a different light. Since she doesn't have a lot of positive interactions in the original series, in fanfic she can be developed in new ways through her relationship with Hermione. This allows for more creativity and exploration of the Harry Potter universe.
The popularity also lies in the fact that the 'Harry Potter' universe has a huge fan base. Fans love to explore different relationships and scenarios that J.K. Rowling might not have fully explored in the original books. Malfoy and Hermione's relationship offers a whole new perspective on the Hogwarts dynamic. There's so much room for creativity in fanfics to develop their relationship, from enemies to friends to lovers, and all the different plotlines that can come with it.
In this fanfic, Cleo getting sick could lead to some interesting plot developments. Maybe it shows how the other characters in H20 react to her being ill. They might have to take care of her, which could strengthen their relationships.