Well, a new Overlord RWBY fanfic might feature unexpected crossovers between the two universes or explore previously unexplored character relationships. It could also introduce new villains or challenges for the heroes to overcome.
Maybe it's the 'overlord' concept. Most RWBY fanfics might focus on the regular storylines within the RWBY world, like the battles against Grimm and the development of the four main characters. But 'A new overlord RWBY fanfic' could introduce a new power structure or a different kind of antagonist based on the 'overlord' idea, which would set it apart from others.
One plot idea could be that a character from RWBY gets transported to the world of Overlord. They might have to navigate the power - hungry and often dangerous world, trying to find a way back home while also dealing with the various powerful beings in Overlord. For example, Ruby could end up in the Tomb of Nazarick and have to figure out how to interact with the Floor Guardians without getting killed.
I think Ruby would be really interesting. Her optimistic and fearless nature in RWBY would contrast well with the often dark and power - based world of Overlord. She could bring a sense of hope and naivete that would either endear her to the Overlord characters or make her a target. Also, her scythe - wielding skills and her use of her speed Semblance could be unique in the Overlord world.
Well, I haven't actually read this specific fanfic yet. But generally in RWBY fanfics, good parts could be the unique character interactions. Maybe in 'A new overlord RWBY fanfic', the new take on the relationships between the main RWBY characters like Ruby, Weiss, Blake and Yang could be interesting. It might also have cool fight scenes that are written in a more creative way compared to the original series.
The unique aspect of Overlord RWBY fanfics is the blend of two very different universes. Overlord has its dark, power - based hierarchy and complex magic systems, while RWBY has its own diverse world with unique characters and a different kind of power called Aura. When combined, it creates a whole new set of story possibilities.
One interesting 'Overlord RWBY' fanfic is 'Overlord in Remnant'. It combines the unique elements of the Overlord world with the vibrant setting of RWBY. The story often has the Overlord characters interacting with RWBY characters in unexpected ways, which makes for an exciting read.
One interesting RWBY Overlord fanfiction could be one where the characters from RWBY are transported to the world of Overlord. They might have to adapt to the new and often darker and more dangerous rules of that world. For example, Ruby could be intrigued by the magic system in Overlord and try to learn it while also facing the threats of the various powerful entities there.
It's not appropriate in most cases. The RWBY series is aimed at a wide audience, including younger viewers. Self - harm is a serious issue that can be very triggering. While fanfiction can explore different ideas, this particular topic goes against the spirit of the RWBY franchise which is about growth, unity, and heroism. However, if it is clearly marked as containing disturbing content and is only aimed at an adult audience who can handle such heavy themes, it might be more acceptable, but still not in line with the general feel of the RWBY fandom.