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.
One common theme is power struggle. Cinder is often power - hungry, and Amber is a Maiden with great power. Their interactions can be centered around who is more powerful or who gets to control certain things. Another theme is redemption. Some fanfictions explore the idea of Cinder finding redemption through her relationship with Amber.
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.
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.
You can try fanfiction websites like Archive of Our Own (AO3). There are a large number of RWBY - related fanfictions there, including ones about Cinder Fall and Amber. Another option is FanFiction.net, which also has a wide range of works. Just search for 'Cinder Fall x Amber' in the search bar on these sites and you should be able to find some interesting stories.
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.