One common theme is legacy. The children often have to live up to the reputations of their parents. For example, if their parents were great hunters, they feel pressured to be just as good.
Another common theme is the struggle against new threats in the RWBY world. The children in these fanfictions are sometimes faced with threats that are different from what their parents dealt with. They have to use their unique skills and the knowledge passed down from their parents to overcome these new challenges. This shows how the RWBY universe is evolving and how the new generation has to adapt to it.
The idea of good vs. evil is prevalent. RWBY has the fight against Grimm and various villains, and DMC has battles against demons. In fanfictions, these two concepts of evil often merge. For instance, a new type of demon - Grimm hybrid might be created, and the combined characters from both franchises have to fight it. And there's also the theme of friendship and teamwork, as characters from different backgrounds learn to work together to face the challenges.
One common theme is power - up. The characters often gain new or enhanced powers, like Ruby getting super - speed in addition to her scythe skills. Another theme is the fight against greater threats. Since superheroes are known for taking on big bads, in RWBY fanfiction, they might face stronger Grimm or new types of villains.
Love and friendship are common themes. Many fanfictions explore how Ruby and Blake's relationship evolves from friendship to something more. They often face challenges together that strengthen their bond.
In RWBY vampire fanfiction, a frequently seen theme is the clash of cultures. The RWBY world has its own set of values, and vampires bring in their own set of rules and behaviors. This can lead to interesting interactions and conflicts. Another theme is the search for a cure. If a character is turned into a vampire, they or their friends may be on a quest to find a way to reverse the transformation. And the theme of outcasts also exists. Vampires are often seen as outcasts in the RWBY world, and this can be explored in terms of how they deal with being shunned by society and how they form their own communities or try to integrate into the existing ones.
One common theme is the struggle against darkness. Both RWBY and Berserk have elements of a dark world, so in fanfiction, characters often face overwhelming evil forces. For example, in many fics, RWBY characters might encounter the same kind of demonic entities as in Berserk. Another theme is the search for identity. Characters from both universes might question who they are in a crossover situation.
One common theme is redemption. Many fanfictions explore the possibility of Cinder finding a way to atone for her actions. Another is power - seeking. Since Cinder is often depicted as power - hungry, fanfictions may expand on her pursuit of more power. And there's also the theme of identity, as she tries to figure out who she really is beneath all the villainy.
Survival is also a prevalent theme. Facing the Nuckelavee, the RWBY characters are pushed to their limits to survive. This can lead to some intense and exciting plotlines. Additionally, the theme of discovery might be present. As they fight the Nuckelavee, they could discover new abilities or secrets about the RWBY world.
One common theme is the crossover of two different universes. Since Izuku is from My Hero Academia and RWBY has its own unique world, exploring how they interact and collide is a big theme. Another is power growth. Izuku usually has his own set of powers and abilities, and in the RWBY world, he either adapts or combines his powers with the RWBY characters' abilities. Friendship is also a common theme. As Izuku meets the RWBY characters, they form bonds and go through adventures together, just like in their respective original stories.
A common theme is the clash of different universes. Since RWBY and TF2 have very distinct settings, seeing how they interact is always interesting.
One common theme is the struggle between duty and love. In RWBY, the characters often have important missions, and the fanfictions explore how their romantic relationships are affected by their duties. For example, a character might have to choose between protecting their loved one or fulfilling a task for the greater good.