One popular one might be 'A Different Beginning' which explores their relationship as they meet in a small wizarding village near their homes before Hogwarts. It shows how their initial encounters gradually turn into a budding romance.
A magical creature could also be an important character. Imagine a friendly house - elf that they meet. The house - elf could be in some sort of trouble, and Harry and Daphne decide to help it. This adventure with the house - elf could shape their relationship and also introduce them to different aspects of the magical world.
Maybe they attend a pre - Hogwarts magic class together. Harry struggles a bit with some of the advanced spells being taught, and Daphne, though initially a bit aloof, decides to help him. This could start a relationship where they learn from each other, with Daphne learning about Harry's unique experiences outside the wizarding world and Harry getting a better understanding of the pure - blood society through Daphne.
Well, they might become friends. Maybe they discover they have a shared interest in magic even before getting to Hogwarts. For example, they could both be fascinated by magical creatures and exchange stories about the ones they've read about.
One possible plot could be that they meet in Diagon Alley. Maybe Harry is lost while shopping for his school supplies and Daphne helps him find his way. This could start a friendship where they exchange stories about their expectations for Hogwarts. It might also be a chance for Daphne to see Harry as more than just the famous Boy - Who - Lived, and for Harry to make a friend outside of the Weasleys and Hermione.
If they meet before Hogwarts, they might already have a sense of loyalty towards each other. So when they get to Hogwarts, they could look out for one another. For example, in a dangerous situation like a run - in with a rogue magical creature, they would be more likely to help each other compared to if they were just acquaintances. This pre - Hogwarts meeting could also mean they have inside jokes or shared memories that make their Hogwarts years more enjoyable.
You could also follow some well - known Harry Potter fanfiction authors. If they have written in this genre before, they might recommend other similar fanfictions or even write more in the future. Check their author pages on the fanfiction websites and see if they have any works related to Harry and Daphne's pre - Hogwarts romance.
It could be a rivalry - like relationship at first. Daphne, coming from a pure - blood family, might be a bit haughty towards Harry, who is new to the wizarding world. But as they interact more, this rivalry could turn into respect and then friendship. For example, they might compete in a pre - Hogwarts magical duel, and after Harry shows his courage and skill, Daphne starts to see him in a new light.
The dynamic would change in several ways. First, in the classrooms, they might work together on projects more often, which could lead to better grades for both of them. Their friendship could also influence the Quidditch matches. Maybe Daphne would convince some of the Slytherin students to not be as rough during the matches against Gryffindor. Also, in social events, their combined presence could break the ice between Slytherins and Gryffindors, creating a more inclusive and friendly environment at Hogwarts.
Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Just search for 'Harry is a Runemaster before Hogwarts' in their search bars and you'll likely find several stories to choose from.