In Bardock x Gine fanfics, a frequently seen theme is the struggle against destiny. Their relationship might be fated to be difficult or full of obstacles due to their Saiyan heritage and the events that surround the Saiyan race. Another common theme is the exploration of different personalities. Bardock is often portrayed as a strong - willed and battle - hungry Saiyan, while Gine is more gentle. The fanfics explore how these different personalities interact and complement each other. And unity is also a theme, as their relationship can be seen as a form of unity in a divided Saiyan society.
One common theme is forbidden love. Since Saiyan society has its own rules and hierarchies, their relationship might be seen as going against the norm. Another theme is the power of love in a harsh world. Saiyans are known for their strength and battle - oriented nature, but these fanfics often show how love between Bardock and Gine can be a powerful force even in such a world. Also, there's the theme of sacrifice, like one of them might have to sacrifice something for the sake of their relationship or for the other's well - being.