You could write a fanfic where the animals in RWBY have their own society parallel to the human one. The animals have their own rules, leaders, and even a form of Dust - based magic. The RWBY team stumbles upon this hidden animal society while on a mission. They must then decide whether to interfere or let the animals handle their own problems, all while trying to understand the complex relationships within the animal community.
One idea could be a fanfic where the RWBY characters transform into animals. For example, Ruby could turn into a little red fox, with her speed and agility enhanced. Another idea is an animal - centered adventure where the team has to protect a magical forest full of rare and mythical animals. They might encounter a giant griffin or a group of intelligent ravens that can communicate secrets about the Grimm.
One idea could be a fanfic that explores the backstories of minor characters in RWBY more deeply. For example, you could focus on a character like Velvet and create a story about her training before coming to Beacon. Another could be a crossover within the RWBY universe itself, like a team-up between different schools' teams that we haven't seen much of in the official series.
Well, for animal transformation fanfic, you could have a story where a person transforms into a cat. They would then have to adapt to the feline lifestyle - climbing trees, chasing mice (or toys that look like mice), and napping in sunny spots. Or perhaps a transformation into a dragon. This would involve dealing with the huge size, breathing fire (if it's that kind of dragon), and being feared or revered by the people in the story's world. It could be really cool to write about how the character copes with this new identity.
Well, one interesting idea could be the concept of an animal remembering its past lives. For example, a cat in the fanfic might recall being a bird in a previous life and having different instincts and experiences that still influence it in its current feline form.
For a 'rwby breeding fanfic', you might look at the idea of cross - species breeding if there are non - human characters in RWBY. Maybe a Faunus character breeds with a human - like character. This could bring up all sorts of interesting cultural and physical differences in the offspring. The fanfic could explore how the society in RWBY reacts to such cross - breeding, whether there is acceptance or discrimination, and how the characters themselves deal with the consequences of their actions.
You could base the fanfic on a quest. The RWBY team is hired by a DND - like noble to retrieve a powerful artifact. This artifact could be something that has the power to change the balance in Remnant (the RWBY world). Along the way, they encounter classic DND monsters like dragons and beholders. They also meet different DND races, such as elves and dwarves, and have to form alliances. Ruby might be the leader in this quest, using her quick thinking and charisma, while Weiss uses her knowledge of magic and lore to figure out clues.
One idea could be exploring the backstories of minor characters in more depth. For example, you could focus on a character like Velvet and her experiences at Beacon Academy before the main events of RWBY. Another idea is to create an alternate universe where the Dust technology has different properties or uses. Maybe in this AU, Dust can be used to create temporary portals to different locations.
A prequel could center around the formation of the different kingdoms. Explore the political tensions and alliances that were made. You could also show how the Dust was discovered and how it became such an important resource. This would give readers a better understanding of the world of RWBY before the events of the main series.
Well, you could do a crossover where the Danganronpa students are transported to the RWBY world. They'd have to adapt to the Grimm and the Huntsman - Huntress system. Or perhaps create a scenario where the two universes are merged, and there are new rules for survival. The characters from both series would have to form alliances based on their skills and personalities.
Well, you could do a fusion fanfic where the characters fuse due to some ancient magic or a powerful relic. Maybe there's a relic that when activated, causes two characters to fuse together. You could have a plot where the fused characters have to figure out how to control their new powers and how to separate themselves. And they might face challenges that only their combined abilities can overcome, like fighting a super - powerful Grimm that normal teams can't handle.
Well, one idea could be the use of nuclear energy in the RWBY universe to power new types of weapons. For example, a weapon that harnesses nuclear fusion to create extremely powerful blasts. Another could be the exploration of how nuclear power affects the Grimm. Maybe the radiation from nuclear sources either attracts or repels them in unique ways.