The relationship could develop through shared interests. Say they both have a passion for ancient magic. They start discussing it in the library, and as they do, they find themselves drawn to each other more and more. Their conversations grow deeper, and before long, they realize they're in love. Harry might share his experiences with Voldemort with Daphne, and Daphne could open up about her family's expectations. This mutual sharing of personal and difficult things would strengthen their bond.
I really like 'Harry and Daphne: The Unlikely Pairing'. In this fanfiction, it starts with them having some initial misunderstandings but as the story progresses, their true love blossoms. It also has an interesting plot with a bit of mystery and adventure that adds to the charm of their relationship.
One popular type of fanfiction in this regard might be where Daphne Greengrass, a Slytherin student, starts to see Harry Potter in a different light. Maybe they are paired together for a project in Potions class and gradually develop feelings for each other. Their relationship could be filled with the typical challenges of different house rivalries and the overarching threat of Voldemort. For example, Daphne might initially be hesitant due to Harry's Gryffindor status, but as they get to know each other better, they find common ground in their fight against the Dark Arts.
One common theme is the idea of breaking boundaries. Since Daphne is often seen as a Slytherin and Harry as a Gryffindor, their relationship challenges the traditional house rivalries in Hogwarts.
Perhaps in this fanfiction, they meet outside of Hogwarts in a magical garden. Daphne is there to study rare magical plants, and Harry stumbles upon the place while exploring. They initially have a bit of a spat as Daphne is protective of her study area, but then they gradually realize they have a connection and start to fall in love.
Another theme is the power of love in a magical context. Their love can often be shown to have magical effects or be intertwined with the magic around them. It could be that their love is the key to solving a great magical mystery or protecting their world from a dark force. This gives a sense of grandeur and importance to their relationship.
The appeal of 'Harry and Daphne True Love Fanfiction' lies in the novelty of the pairing. Since they are not a canon couple, it allows for a fresh take on relationships in the Harry Potter universe. It gives writers the freedom to create unique storylines for them.
Some fanfictions have a plotline where Daphne Greengrass has a secret power or ability. Harry discovers this during their adventures together. Their love grows as they work together to harness or hide this power from the wrong people. It could also lead to a situation where Daphne becomes a target because of her power, and Harry has to protect her, strengthening their bond.
The relationship could also develop through cultural exchange. Daphne, being from a pure - blood Slytherin family, has different values and traditions compared to Harry. As they get to know each other, they introduce their respective cultures to one another. This leads to a deeper understanding and a more profound emotional connection between them.
In some fanfictions, their relationship develops through shared secrets. Daphne might share some Slytherin secrets with Harry, and in return, Harry tells her about his experiences with Voldemort. This sharing of personal and important information brings them closer together. They start to rely on each other more and more, and eventually, their relationship can range from a deep friendship to a romantic one, depending on the direction of the fanfiction.