Then, introduce some shared experiences. Maybe they get trapped in a strange dimension together. In this new and dangerous place, they have to rely on each other's strengths. Goku's physical power and Frieza's cunning could be the keys to their survival. As they go through these experiences, they start to see each other in a new light and their relationship begins to change.
Well, friendship is also a theme. Despite their differences, they might form an unlikely friendship. In some fanfictions, they learn from each other. Goku might learn about strategy from Fem Frieza, while Fem Frieza could learn about determination and the will to protect from Goku. And of course, adventure is a big theme. They could go on quests together, exploring new planets and facing new challenges.
One common theme is redemption. Frieza is often portrayed as having a chance at redemption through his interactions with Goku. For example, in some fanfics, Goku's unwavering belief in the good in people (or in Frieza's case, beings) starts to make Frieza question his own evil ways.
Some writers show the Frieza race's culture as being very hierarchical. There's a clear pecking order, with the strong ruling over the weak. They might also depict their culture as being focused on power acquisition. For example, in many fanfictions, young Frieza race members are trained from a young age to be powerful warriors.
First, give her unique abilities. Maybe she can control a different type of energy than other Frieza race members. Second, give her a complex personality. She could be arrogant like the typical Frieza race, but also have a hidden soft side. For example, she might secretly care about the well - being of a small group of beings on a planet she was supposed to destroy.
One theme that frequently shows up is identity. Female characters of the Frieza race often question who they are and what they stand for. They might not want to conform to the cruel and power - hungry nature of their race. Also, friendship and alliances are common themes. These female characters form unexpected bonds with other races in order to survive or achieve their goals.
In some fanfictions, the connection between Naruto and the Frieza race could be through a crossover of universes. Maybe a magic or some sort of interdimensional rift brings them together. For example, a powerful villain might use a forbidden jutsu in the Naruto world that accidentally opens a portal to the Dragon Ball universe where the Frieza race exists. This could lead to all kinds of interesting interactions, like Naruto trying to understand the Frieza race's power structure and them being equally intrigued by Naruto's chakra abilities.
One interesting plot could be Goku and Fem Frieza having to team up against a new, powerful enemy. Maybe this enemy is threatening both of their planets or has some power that neither can defeat alone. Another plot could be Fem Frieza falling in love with Goku and trying to change her evil ways to be with him, but struggling with her past and her reputation among the villains.
One popular Goku and Frieza fanfiction might be those that explore their unlikely alliance. For example, a story could be about them teaming up against a greater threat in the Dragon Ball universe. In these fanfictions, the authors often play with their characters' personalities. Goku's pure - heartedness could contrast with Frieza's devious nature, creating interesting plot dynamics.