In some fanfictions, Harry taking Hermione to the Yule Ball could lead to a whole new adventure. For example, while at the ball, they accidentally stumble into a hidden room. Inside the room, there are ancient artifacts that hold the key to a mystery that has been plaguing Hogwarts for years. They then use their wits and knowledge to figure out what the artifacts mean and how they can use them to solve the mystery, all while still enjoying the Yule Ball and their time together as a couple in this fanfiction world.
One idea could be that they go to the Yule Ball and have a magical dance, but then face some jealousy from Ron. Another could be that during the ball, they discover a secret about the tournament that is related to the Yule Ball's origin. Maybe they also have a deep conversation on the balcony about their future and how their friendship might change.
A plot might involve Hermione helping Harry learn all the proper dance steps before the Yule Ball. Then, at the ball, they are the best - dancing couple on the floor. But then, they notice some strange behavior from other students which leads them to suspect that there is some dark magic at play. They then use their skills and knowledge to figure out what's going on and save the day.
One great fanfiction could be where they go to the Yule Ball and it's a chance for them to really see each other in a new light. Maybe they share a slow dance and have deep conversations that make them realize their feelings for each other are more than just friendship. They might face some jealous glances from others, especially Ron who has his own complicated feelings about Hermione.
A great plot idea for Draco and Hermione Yule Ball fanfiction is that the Yule Ball is enchanted in a way that pairs people based on their hidden desires. Draco and Hermione end up together as a result. At first, they are both resistant, but as they dance and talk during the ball, they discover that they have more in common than they thought. For example, they both have a deep love for books, just different genres. Also, their shared experiences of growing up in the wizarding world, despite being from different houses, start to create a bond. This Yule Ball encounter could be the start of a new relationship that challenges the norms of their school.
Well, a plot could involve a character who is an outcast getting a magical makeover just for the Yule Ball. They enter the ballroom and everyone is shocked. Or perhaps there's a mystery at the Yule Ball. A valuable magical item goes missing during the event, and the main characters have to solve the mystery before the night ends. It could also be about two rivals who end up having to dance together at the Yule Ball and discover they have more in common than they thought.
One idea could be that Katie asks Harry to the Yule Ball in a very unique way, like leaving him a series of enchanted clues around Hogwarts. Another could be that they get paired up for a special Yule Ball dance competition and have to learn a difficult dance together. Or perhaps they discover a secret about the Yule Ball that no one else knows and have to keep it safe during the event.
A plot idea could be that Ginny is initially asked to the Yule Ball by someone else, but Harry steps in at the last minute. They then have to deal with the fallout from the jilted suitor during the ball. It adds some drama to their otherwise romantic evening.
One idea could be that Hannah and Harry get paired up for a special Yule Ball dance competition that's not part of the regular ball. They start off as strangers but gradually bond through their shared love for dancing and the magic of the Yule Ball.
One idea could be that Gabrielle is initially shy at the Yule Ball but Harry helps her come out of her shell. They share a dance and start a friendship that might develop into something more in the future.
Maybe Parvati gets a premonition during the Yule Ball that something bad is about to happen at Hogwarts. Harry, being the hero he is, believes her and they start to investigate. Along the way, they face some challenges and in the end, their relationship deepens because of the trust they've built.
A lot of fanfictions focus on the idea that Harry taking Hermione to the Yule Ball is a way for them to escape the expectations others have of them. At the ball, they find themselves in a world of their own. They could be dancing and suddenly realize that they have a unique connection that they've been overlooking. It might also involve them facing some sort of magical challenge during the ball that tests their relationship.