One idea could be a story where they are all assigned to a special project at Hogwarts. Blaise, Draco, Hermione, and Theo have to put aside their differences and work together. Maybe it's a research project on a long - forgotten magic that could potentially be dangerous if misused. As they dig deeper, they start to understand each other better. Hermione's knowledge, combined with the Slytherins' cunning, makes for an interesting dynamic.
A plot could revolve around a mystery in the Forbidden Forest. They all end up there for different reasons. Blaise might be looking for a rare ingredient for a potion, Draco could be following a lead related to his family's secrets, Hermione is investigating some strange magical disturbances, and Theo is dragged into it. They find themselves having to rely on each other to survive the forest's perils and solve the mystery.
A plot could be set post - Hogwarts. Draco and Blaise are trying to redeem their families' reputations in the wizarding world. Hermione, being the brilliant witch she is, is working on some important magical research. Their paths cross when a dark magic artifact resurfaces. Hermione believes it can be used for good if studied properly, while Draco and Blaise are worried it will fall into the wrong hands again. So they team up to protect it and study it.
One plot idea could be a story where Blaise and Draco have to team up with Harry and Hermione for a special magical tournament. They start off as reluctant allies but gradually learn to respect each other's skills. Another could be a mystery - something strange is happening at Hogwarts and the four of them must put aside their differences to solve it. For example, students are losing their magical abilities one by one, and they suspect a dark magic artifact hidden in the castle.
One plot idea could be that Draco and Blaise kidnap Hermione as part of a misguided attempt to gain some sort of leverage in the wizarding war. Maybe they think they can use her knowledge to find a way to end the conflict on their terms. Another could be that they believe she has a hidden power or secret that they want to uncover for their own gain. For example, they might think she has a connection to a powerful magical artifact that they are desperate to get their hands on.
For Blaise, you could explore his loyalty to his friends further. Maybe he has to choose between his loyalty to Draco and Theo and doing what's right when it comes to Hermione. For Draco, show his growth from his prejudiced ways. His interactions with Hermione could be a catalyst for that. Theo can be developed by showing his insecurities and how he overcomes them through his friendships. Hermione can learn more about the Slytherin side of things and become more empathetic towards them.
In fanfiction, their relationships can be explored in various ways. For example, Hermione might have a complex relationship with Snape, perhaps starting with distrust due to his harsh treatment in the original series but evolving as she discovers more about his past. With Draco, she could initially be enemies but later find common ground. Lucius might be seen as a menacing figure in the background, influencing Draco's actions. Blaise and Theo could be Draco's sidekicks, and their relationships with Hermione might develop through various plot twists like school projects or magical adventures. Overall, fanfiction allows for creative interpretations of how these characters interact.
One common plotline is a time - travel scenario. Hermione might go back in time and interact with a younger Snape, Lucius, and the others. This could lead to her trying to change the future, like preventing Draco from following in his father's dark footsteps. Another plotline could be a magical mystery where they all have to work together. For example, a powerful dark magic object is discovered, and Hermione teams up with Draco, Blaise, and Theo, while Snape and Lucius are reluctantly involved too. And there's also the plotline of a secret society where they are all members, with Hermione bringing a different ideology that challenges the pure - blood - centric views of some of the others.
One idea could be that Hermione is turned into a vampire against her will and Blaise, who has been a vampire for a long time, takes it upon himself to teach her how to control her new powers. He could introduce her to the vampire society and they end up falling in love during the process.
Another idea is that the OC is a Muggle - born with an amazing talent for potions. They end up in a class project with Harry, Draco, and Blaise. Their different approaches to the project (Harry's courage, Draco's ambition, Blaise's shrewdness) and the OC's out - of - the - box thinking create a really interesting dynamic as they compete and also learn from each other.
One plot idea could be that the Marriage Law forces Hermione and Blaise together. At first, they are very reluctant and constantly bicker. But as they get to know each other's intelligence and hidden depths, they start to develop a grudging respect. Eventually, they find common ground in their love for knowledge and magic, and their relationship evolves into a real marriage.
One interesting plotline could be Draco and Blaise competing for Hermione's attention in a magical school setting. Maybe they start off as rivals but then realize they have more in common when it comes to their feelings for Hermione. Another could be a story where Hermione has to choose between them while they are all involved in a dangerous adventure against dark magic.