If Lavender was cursed in some way that made her forget her memories of Hogwarts, Harry could be the one to help her regain them. He would take her around the castle, showing her familiar places and telling her stories of their time together. As she slowly starts to remember, she begins to see Harry in a new light. This process of rediscovery could lead to a deep and emotional connection between them, as they are basically rebuilding their relationship from scratch. And it would also show Harry's caring side towards someone who wasn't necessarily in his inner circle before.
A unique way to develop their relationship could be through a magical accident that makes Snape relive some of Harry's memories and vice versa. Snape sees Harry's pain of losing his parents and Harry sees Snape's difficult childhood. This deepens their understanding of each other. They then start to communicate more openly, with Snape giving Harry more advice based on his own experiences and Harry showing Snape that there is more to him than just a Gryffindor student. They form a bond that is based on mutual understanding and respect that was not there before.
In the fanfiction, their relationship could be developed uniquely if Fem Harry Potter is from a different magical culture. James Potter is intrigued by her different ways of using magic and her cultural beliefs. They start to exchange knowledge and through this, a relationship blossoms. James helps her adapt to the Hogwarts way of life while she broadens his perspective on magic in general, and they become very close as a result.
Their relationship could develop through a shared love of a particular magical creature. For example, they both discover a new, endangered magical creature and have to work together to protect it. This shared mission could bring them closer.
Their relationship could develop through a shared love of potions. Harry discovers he has a natural talent for it, much to Snape's surprise. Draco, being a traditional Slytherin, also excels in potions. They start to compete in a friendly way, which then turns into a mutual respect for each other's skills. This could lead to them working together on a special potion project that requires both Gryffindor - like boldness (from Harry) and Slytherin cunning (from Draco).
Their relationship could be developed uniquely by having Hermione be the one to teach Dumbledore something new. For example, her knowledge of Muggle technology or her different approach to problem - solving could offer a fresh perspective for Dumbledore. This would create a more equal dynamic between them rather than the traditional teacher - student or mentor - mentee relationship.
One unique way to develop their relationship is by making them have a common enemy that is not related to the Autobot - Decepticon conflict. This external threat forces them to put aside their differences. Also, if Bumblebee saves Megatron's life not out of kindness but because he realizes that Megatron's death would cause more chaos. This act of self - interest that has a positive outcome for Megatron can start to change their relationship. Moreover, if they both get exposed to a strange energy source that makes them see each other's memories. This shared experience of seeing into each other's minds can lead to a deeper understanding and a different kind of relationship.
Their relationship could develop through shared secrets. For example, they both discover a hidden power within their town that they must keep a secret from others. This shared burden brings them closer.
Their relationship could be developed uniquely by having Kelly teach Castiel about human emotions in a more in - depth way. Since she is going through such a unique and intense experience being pregnant with a special child, she can share her feelings and perspectives that make Castiel see humans in a new light, thus strengthening their bond.
The relationship could develop uniquely if Fem Harry Potter uses her empathy skills. Since she is different from the original Harry, she might be more in tune with Bellatrix's pain and past traumas. For example, if she discovers that Bellatrix was once a victim of dark magic herself which led her to become a Death Eater, Fem Harry Potter could try to heal her. This would create a very different dynamic compared to the usual enmity between Harry and Bellatrix.
It should start with small interactions. For example, Harry could be polite to Lavender when she tries to talk to him about her day. Then, they could be paired for a class project in Herbology. Working together on taking care of a difficult plant would give them time to get to know each other better.