Well, a plotline could be that Fred's crush on Hermione creates some tension within the Weasley family. His siblings might notice his change in behavior around her and start teasing him or trying to play matchmaker. Meanwhile, Hermione could be completely oblivious to Fred's feelings at first. She's so focused on her studies that she doesn't pick up on his subtle hints, like the way he always offers her the last piece of treacle tart. This could lead to some comical misunderstandings as Fred tries harder and harder to get her attention.
A plot could involve a magical accident that causes Hermione to see Dolohov in a different light. Maybe a spell backfires and she starts seeing his memories, understanding his past traumas that led him to become a Death Eater. This new understanding makes her develop feelings for him. But she has to deal with the fact that he's still on the wrong side in the eyes of the wizarding world. She might then try to subtly nudge him towards the good side while hiding her crush from everyone else.
Well, a plotline might involve a bet about who can better handle a dangerous magical creature encounter. Hermione would rely on her extensive book knowledge, while Fred would use his hands - on experience with magical creatures from his time at the Burrow. It could also be a bet on who can win over a particularly stubborn Hogwarts professor to their side for a school project. Maybe a bet on who can brew the most effective potion in a limited time too.
A possible plotline is that Lucius, having a crush on Hermione, starts to question his loyalty to Voldemort. His feelings for her make him realize the wrongness of the pure - blood ideology. Another interesting one could be that Hermione, being the smart one, figures out Lucius's crush and uses it to manipulate him into helping the Order of the Phoenix. And there could be a plotline where Lucius tries to court Hermione in his own, rather clumsy, way which leads to some really awkward and yet endearing moments.
One possible plotline could be Fleur struggling with her feelings. She might be in a situation where she has to interact with Hermione a lot, like during some magical events or projects at Hogwarts or in the wizarding world. And she gradually realizes that her feelings are more than just friendship.
One common plotline is them teaming up to play pranks on other students in Hogwarts in a more elaborate and creative way. Since Hermione is very intelligent and Fred and George are creative with their pranks, they combine their skills.
A really interesting plotline could be set in a post - war scenario. Fleur, who has always had a crush on Harry, decides to actively pursue him. She starts by sending him anonymous gifts, which Harry is very curious about. When he finally figures out it's Fleur, they start to have conversations about the war, their losses, and slowly their relationship blossoms into something more than just a crush.
Another plot could be centered around rivalry. The twin might be jealous of Hermione's popularity at Hogwarts. So, they start competing in various aspects, such as in Quidditch (even if Hermione isn't really into it, the twin could be). This rivalry could cause some tension between them, but eventually, they would realize that they are stronger together and reconcile.
Well, one plotline could be that Hermione tries to impress Fleur by excelling in areas she thinks Fleur would admire. So she might study really hard in subjects like Charms or Transfiguration to show off her skills. Another could be that Hermione's friends try to play matchmaker, which could lead to all sorts of comical and awkward situations. There could also be a plotline where Fleur is initially put off by Hermione's attention, thinking it's just some strange Hogwarts behavior. But as time goes on, she starts to see Hermione's true self and her feelings begin to change. This could lead to a slow - burn romance that develops over time, with many obstacles along the way, like cultural differences between Hogwarts and Beauxbatons students.
Fred is outgoing and mischievous. Hermione is studious and rule - abiding. Their personalities could clash at first. Fred might try to get Hermione to loosen up with his pranks, which could annoy her. But then Hermione could show Fred the importance of being responsible and studying. Eventually, they could find a middle ground where Fred is a bit more serious and Hermione is a bit more fun - loving.
A really interesting plotline could involve Hermione's military boyfriend being transferred to a location near Hogwarts. This would bring a whole new dynamic to Hermione's life. She might have to balance her studies and her magical duties with spending time with him. His military discipline could also influence her in positive ways, like making her more organized in her spell - casting practice. Maybe his unit discovers something strange in the area around Hogwarts that is related to the wizarding world, and Hermione and he have to work together to figure it out, all while dealing with the cultural differences between the military and the wizarding community.