A frequent plotline involves their family drama. With Hermione being a Muggle - born and Draco and Blaise from pure - blood families, there would be a lot of family issues to deal with. For example, how would the Malfoy family react to having a Muggle - born as part of their family? Also, they might be forced to work together to protect their family from threats. Maybe an old enemy of the Malfoy family targets them because of their new family situation. There could also be a plotline where they explore their magical abilities together and discover new and unique forms of magic due to their special connection as triplets.
Often in such fanfictions, there's a plotline centered around their Hogwarts years. They might struggle to fit in with their respective houses while also maintaining their connection as triplets. There could be a story where they have to choose between their house loyalties and their loyalty to each other. Another common plot is them using their combined influence in different social circles (Hermione in Gryffindor and among Muggle - borns, Draco in Slytherin and among pure - bloods, and Blaise in Slytherin as well) to bring about change in the wizarding world, like trying to end the discrimination between pure - bloods and Muggle - borns.
One common theme is redemption. Draco and Blaise, especially Draco as he was a former Death Eater supporter, often have a journey of self - discovery and redemption in these fanfictions. Hermione usually plays a role in either facilitating or being a part of that change. Another theme is the exploration of relationships that cross traditional boundaries, like the relationship between a Muggle - born like Hermione and pure - bloods Draco and Blaise.
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.
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.
In fanfiction, anything can be possible. Writers might rewrite the backstories of the characters. Maybe they could create a scenario where some powerful magic was involved at their birth that made them triplets despite their different families in the original story. For example, a dark wizard could have experimented with a spell that merged three different pregnancies into one, creating the situation where Hermione, Draco and Blaise are triplets.
One possible fanfiction could be about Blaise, Hermione and Draco all studying in the library. Maybe they start off as rivals, but as they spend more time in the library together, they begin to understand each other better. For example, Hermione might be helping Blaise with a difficult spell, and Draco overhears and joins in with some of his own knowledge. This could lead to an unlikely friendship between the three of them.
One great 'Hermione and Draco and Blaise fanfiction' is 'The Golden Trio's New Allies'. It shows an interesting dynamic between them as they work together on a complex magical mystery. The characterizations are really well - done, especially Hermione's intelligence and how Draco and Blaise gradually change their views of her.
A lot of these fanfictions also explore the characters' post - Hogwarts lives. How they navigate the wizarding world as adults, deal with the aftermath of the war, and how their relationships develop in this new phase of life. For instance, they might be working together on some important wizarding project, and that's where their relationships start to change and grow.
One common plotline is the redemption arc. The OC could be the key factor in Draco's redemption. For example, the OC might see the good in Draco that others overlook and encourage him to break away from his dark family ties. Harry could be initially skeptical but gradually come to accept Draco's change. Blaise might be caught in the middle, trying to support his friend Draco while also maintaining his own standing. Another plotline could be a mystery adventure. The four of them team up to solve a mystery that threatens Hogwarts. Each character brings their own skills to the table - Harry's courage, Draco's knowledge of the Slytherin side of things, Blaise's cunning, and the OC's unique perspective or ability.
At first, Hermione would be shocked. But then, she would quickly compose herself. She could play along with Draco and Blaise for a while, pretending to be compliant while she actually gathers information about their motives and the place where they are holding her. She might also try to turn them against each other by highlighting their differences in goals or personalities. Given her intelligence, she would surely come up with a clever plan to get out of the situation.
One common plotline is the 'forbidden love' aspect. Since Draco is from a pure - blood family and Hermione is Muggle - born, their relationship is frowned upon by many in the wizarding world. So, they have to fight against these prejudices to be together and build a family. Another plotline could be about Draco's redemption through his relationship with Hermione. He might change his views on Muggle - borns because of her and they create a family that is a model of the new, more inclusive wizarding world.