Communication is key. In the Halo universe, there are likely language barriers at first. So, having them slowly learn to communicate, whether it's through some form of translator or by learning each other's languages bit by bit. This process of communication can build trust and understanding, which in turn develops their relationship. Also, experiencing different situations together, like surviving in a harsh environment or escaping from a dangerous trap, can bring them closer as they rely on each other's skills.
Communication is key. Since they come from different species with different languages, they could start with simple gestures of peace, like laying down their weapons. Then, slowly learn each other's languages or use some form of translation device. As they communicate, they can share their views on war, honor, and loyalty, which are important concepts in both of their cultures. This would help build a deeper relationship.
Their relationship can be developed through shared battles. For example, when facing a common enemy, they start to rely on each other's unique abilities. Master Chief's superhuman combat skills and Arbiter's leadership within the Covenant structure can complement each other.
Their relationship can be developed through shared experiences. For example, going through intense battles together. Each time they save each other's lives, it deepens their bond. Also, moments of vulnerability, like when one of them is injured and the other has to take care of them. Another way is through conversations during down - time between missions, where they share their thoughts and feelings about the war and their place in it.
For Master Chief, his character could be developed by showing his reaction to working with a former enemy like the Female Arbiter. We could see his internal struggle as he has to trust someone from the Covenant. For the Female Arbiter, her character can be developed by exploring her view of humans through her interactions with Master Chief.
A plot could revolve around a time - travel scenario. The female Elite gets sent back in time and ends up in Master Chief's era. She's confused and lost, and Master Chief has to figure out what to do with her. As they try to find a way to send her back, they form a connection. They learn about each other's cultures and technologies, and this mutual discovery helps them to work together against those who would use the time - travel situation for their own gain.
A realistic way could be through shared experiences of loss or victory. For example, if they both lose someone important during a battle, they can find solace in each other. Or if they achieve a great victory together, the adrenaline and sense of accomplishment could bring them closer. Their relationship would then develop gradually from friendship to something more, as they support each other through different situations in their ninja lives.
Their relationship can be developed realistically by starting with mutual respect for each other's abilities. Megatron respects Female Starscream's cunning and flying skills, and she respects his leadership and power. They could start by working on small missions together, gradually building trust. For example, she could cover his back in a battle, and he could reward her with more responsibilities. This would lead to a deeper connection over time.
One plot idea could be a story where Master Chief and an Elite are forced to team up during a crisis that threatens both their species. They start off distrusting each other but gradually learn to respect and rely on one another.
Their relationship could be developed realistically by having them work towards a common goal. For example, they might be trying to stop a new villain from taking over the world. As they plan and execute their strategies, they see the best and worst in each other. Gohan might see Android 18's determination even in the face of great danger, and Android 18 might see Gohan's selflessness. These experiences can bring them closer and form a relationship based on trust and admiration.
Their relationship could develop through shared experiences. For example, they both have had to deal with the fall of the Jedi Order in different ways. By sharing these stories and the emotions associated with them, they can form a bond. Also, if they are forced to rely on each other in dangerous situations, it can strengthen their connection.