Many Cinder Fall x Roman fanfictions also deal with the theme of survival. They are constantly in dangerous situations, and their relationship can be a means of survival. They might rely on each other's skills and resources to stay alive in a world that is often hostile to them. This can lead to some intense and action - filled stories that really highlight their bond in the face of adversity.
A theme that is quite popular is the idea of redemption. Some fanfictions might have one or both of them trying to break away from their evil ways, and their relationship can be a key factor in that journey. For example, Roman might start to question his actions because of Cinder, or vice versa. There could also be a theme of forbidden love, as they are on the 'wrong' side of the law, so their relationship might be seen as something that society (in the context of the story's world) would not approve of.
One common theme is power. Given their positions as antagonists in the original work, fanfiction often explores how they use or abuse power, both together and separately. Another theme is loyalty, as they are partners in crime, so stories might focus on how far they would go for each other.
There is often a theme of sacrifice as well. In many of these fanfictions, either Cinder or Amber may be put in a position where they have to sacrifice something for the other. It could be their power, their reputation, or even their life. This theme adds a layer of depth and emotional intensity to their relationship. Additionally, the exploration of their pasts and how it brought them to this point in their relationship is also a common theme.
Love against all odds is also a big theme. Given Cinder's nature and the world she exists in, the relationship between her and the male reader is often portrayed as something that has to overcome many obstacles, whether it be social status differences or her own past actions.
Power is a common theme. Cinder is often depicted as either seeking more power or dealing with the consequences of her power - hungry actions. Another theme is redemption. Some fanfictions explore if she can be redeemed after all the bad things she's done.
One common theme is the power dynamic. Since Cinder Fall has a certain level of power in RWBY, the fanfic might explore how the male reader deals with that. Another theme could be redemption. Maybe the male reader tries to change Cinder Fall for the better.
One common theme could be the clash of two different worlds. Naruto comes from a ninja - filled world, while Cinder Fall is from a world with its own set of powers and politics. So, exploring how they adapt to each other's worlds is often seen. For example, Naruto might be amazed by the technology in Cinder's world, and Cinder could be intrigued by Naruto's chakra abilities.
I'm not sure of specific titles off - hand, but often fanfiction about Cinder Fall and Roman will delve into their criminal partnership in more depth. Some stories might show how they met and started working together, perhaps with some backstory added to their characters that wasn't fully explored in the original source material. Another aspect could be how they interact during different heists or battles, with a focus on their unique dynamic.
One common theme is the exploration of their contrasting personalities. Cinder is often seen as more mysterious and brooding, while Ruby is more cheerful and impulsive. Fanfictions like to play with how these two different personalities interact and complement each other.
The theme of redemption also appears. Cinder, with her past actions and the way she was treated, often finds redemption through her relationship with Kai. He helps her to see that she can be more than her past mistakes and that she has the potential to be a great force for good in their world.
One common theme is redemption. Maybe Cinder, who is often seen as a villain, is on a path to redemption because of Ruby. Another theme could be the power of friendship or a strange connection that defies their opposing natures.
Another theme is the exploration of the unknown. Vampires are often associated with mystery, and when combined with the already complex characters of Ruby and Cinder from RWBY, it creates a situation where the characters are forced to explore new aspects of their world and themselves. For example, Ruby might have to face her fears of the supernatural, while Cinder could be using the vampires for her own gain in a world she doesn't fully understand yet.