One possibility is that they could be allies in a fight against a common enemy. The Female Spartan 117 with her combat skills and the Arbiter with his leadership and knowledge of Covenant technology could make a great team. They might start off distrusting each other, but as they face challenges together, they come to respect and rely on one another.
They might interact with a sense of mutual wariness at first. The Female Spartan 117 is a product of human military might, and the Arbiter has a long history with the Covenant. But as they learn more about each other's goals, they could start to cooperate. For example, if there is a new threat emerging that endangers both humans and the Arbiter's people, they would have to put aside their differences.
Their relationship can be developed through shared combat experiences. For example, they could be in a battle where they have to cover each other's backs. This would create a sense of trust. Then, they could start to communicate about their different combat strategies and learn from each other. This exchange of knowledge would deepen their connection.
One plot idea could be a story where a male Spartan and a female Arbiter have to team up for a mission. They start off distrusting each other due to their different species and cultures. But as they face challenges together, like fighting off a common enemy or solving a mystery on an alien planet, they gradually learn to respect and rely on one another. Their relationship could develop from mere comrades to close friends or even something more romantic.
The exploration of different cultures is also a common theme. The Arbiter represents one culture and the Chief represents another. Fanfiction writers like to explore how these two cultures interact. This can include things like differences in combat styles, social hierarchies, and beliefs. It adds depth to the relationship between the two characters as they learn about each other's cultures and sometimes find common ground.
A plot could revolve around a mystery that involves both of their species. The Female Master Chief and the Arbiter start investigating it separately, but their paths cross. As they dig deeper, they realize that their fates are intertwined, and they must rely on each other not only to solve the mystery but also to survive the dangerous forces that are trying to stop them.
Some of the best characters could be those side characters that help the female Spartan X and the female Elite in their adventures. For example, a human engineer who helps them upgrade their weapons or an Elite elder who gives them advice on how to deal with certain inter - species issues. These characters add more depth to the story.
A lot of fanfictions also focus on cultural exchange. The Master Chief is from a human military background, while the Arbiter is from the Covenant. Their interactions can lead to interesting cultural exchanges. For example, they might learn about each other's beliefs, values, or military strategies. Some fanfictions may also delve into a more complex relationship where they have to overcome initial distrust or misunderstandings due to their species' past conflicts.
Some Halo fan communities on Discord may also have fanfiction channels. Members often share their own works or know of good stories. You can join a few relevant Discord servers and explore the fanfic sections there.
In some fanfiction, a female Spartan X and a female Elite end up in a parallel universe where they have to work together to find a way back to their own worlds. During this time, they share their combat techniques and develop a deep friendship that defies the long - standing hostilities between their races.