Perhaps in a post - war scenario in both the 'Harry Potter' and 'Mortal Instruments' universes, Hermione and Draco decide to collaborate on a project to bridge the gap between the two magical communities. Along the way, they face opposition from traditionalists in both worlds who don't want the two communities to mix. Their relationship could develop from reluctant partners to something more as they fight for their cause. This would involve a lot of character growth, exploring new magical concepts, and dealing with the politics of both worlds.
You can start by looking on fanfiction.net. It has a large collection of fanfics related to various fandoms, including those involving characters from 'Mortal Instruments', Hermione, and Draco. Another great place is Archive of Our Own (AO3). Many talented writers post their works there, and you can easily search for crossovers or stories that combine these elements.
A good Mortal Instruments fanfic should have well-developed characters that stay true to the originals while adding new depth. The plot should be engaging and capture the essence of the series' magical world.
One interesting 'a mortal instruments fanfic' story could be about an alternate universe where the main characters have different powers. For example, Clary could have the power to control time instead of her usual abilities. Another could focus on a relationship that was never explored in the original series, like a deeper friendship between Simon and Magnus. There are also fanfics that might explore what would happen if a major villain turned good.
I really like 'Crossing Realms: Mortal Instruments in Hogwarts'. It takes the characters from the Mortal Instruments series and drops them into the world of Harry Potter. It shows how they adapt to the new magical environment, for example, Jace trying to understand Quidditch while also dealing with the threats in Hogwarts that are different from those in his own world.
Well, in such a fanfic, it might show how Draco and Hermione's relationship evolves over time. It could start with them being at odds due to their different houses and family backgrounds. But as the story progresses, they might find common ground. For example, they could both be interested in a particular area of magic that forces them to work together, and through that, their feelings start to change.
Draco and Hermione are often popular characters in fanfiction. Draco is usually depicted as a Slytherin student with a complex personality, and Hermione is known for her intelligence and determination.
An interesting plot. It could be about the OC helping Alec with a mission, or them having a secret that affects their relationship. A good plot keeps readers engaged. For instance, if the OC has a power that is both a blessing and a curse and Alec has to deal with that aspect of them. Also, the chemistry between Alec and the OC is crucial. Their interactions should feel natural and build up gradually, like in a well - written romance where they start as acquaintances and slowly fall in love, through shared experiences and mutual understanding.
One great fanfic could be 'The Hidden Path' which delves deeper into the relationships between the characters. It explores their backstories in a way that the original books might not have fully covered.