They could have Eddie teach Steve about vampire culture. Steve could then use this knowledge to help Eddie in some way, like protecting him from vampire hunters. This would strengthen their bond in a unique way.
Writers can develop their relationship uniquely by giving them a shared goal that is not related to their relationship at first. For example, they might both be trying to solve a mystery in town that has something to do with vampires but also affects the human population. As they work together towards this goal, their relationship deepens. Also, having Eddie struggle with his vampire instincts around Steve, like the urge to bite him, but instead choosing to protect him, can add a unique layer to their relationship.
A unique way for their relationship to develop could be through a shared injury. For example, if they both get hurt in a battle against a common enemy. They would have to rely on each other during the recovery process. Kai, who is usually more closed - off, might open up to Tyson as they share their pain and fears. Tyson, in turn, could show Kai a more empathetic side of himself. This shared experience could change the dynamic of their relationship from just being beyblade rivals to true friends.
Suppose Hermione is working on a project to bridge the gap between wizards and vampires for the betterment of both worlds. Blaise is initially skeptical but decides to help her. As they work together, they face many difficulties and setbacks. Through these shared experiences, they develop a strong bond. Their relationship could be unique in that it's based not just on physical attraction or typical love - at - first - sight, but on a mutual goal and the respect they gain for each other during the process.
Their relationship could develop uniquely if they had to swap powers for a while. Ethan would experience what it's like to be a vampire like Erica, and she would get a taste of being human. This would give them a new perspective on each other. For example, Erica might realize how difficult it is for Ethan to be around vampires all the time, and Ethan would understand Erica's vampire instincts better.
One way to develop their relationship uniquely is to focus on their shared traumas. Maybe they both witnessed something terrible in their past that only they understand. This common ground can be used to create a deeper bond as they heal together. Another way is to give the older sister a special skill or knowledge that Levi respects and needs. For example, she could be an expert in a type of combat that Levi is unfamiliar with, and he has to rely on her for training.
Well, a common trope is the 'discovery' trope. Steve might gradually discover Eddie's true vampire nature, which could lead to a lot of drama and tension. There's also the 'redemption' trope. Maybe Eddie, as a vampire, has a dark past, but through his relationship with Steve, he finds a way to redeem himself. And of course, the 'opposites attract' trope is often used, as they are likely to have very different personalities and lifestyles.
One great 'Eddie x Steve Fanfic' is 'The Unlikely Bond'. It beautifully portrays the development of their relationship from initial distrust to a deep friendship and maybe something more. It has well - written dialogues that really capture the essence of the characters.
I really like 'Steve x Eddie fanfic' like 'Hearts in Harmony'. It delves deep into their personalities and how they complement each other. The way the author writes their interactions, especially the small, tender moments between them, is just amazing. There's also 'Facing the Unknown' which is set in a post - apocalyptic world and shows how they rely on each other to survive.
Their relationship could develop uniquely if Fem Haary starts as an enemy. Maybe she's been brainwashed by an evil force to target Naruto. But as Naruto shows her kindness and the truth about the situation, she slowly starts to change her views and a begrudging respect turns into a deep friendship and then something more.
One way their relationship could develop uniquely is through a shared interest in ancient Cybertronian technology. Suppose they both stumble upon an old relic that holds great power. They have to collaborate to understand and control it. In the process, they start to respect each other's intelligence and skills, which gradually turns into a deeper connection. Also, if they were to be stranded together on a desolate planet for a while, they would be forced to rely on each other, and this could lead to a very different kind of relationship compared to their usual Autobot - Decepticon dynamic.
Their relationship could develop uniquely if Izuku starts teaching Tsuyu about things he's learned from his non - quirk - based studies, like advanced first - aid or survival skills. Tsuyu, in turn, can introduce Izuku to her amphibious friends and the unique world she comes from. This exchange of different knowledge and experiences can bring them closer in a very special way.