A really cool fanfiction idea could be a story that delves into the backstories of the weapons in both series. In RWBY, weapons are an important part of a hunter's identity, and in Soul Eater, the weapons are characters themselves. A fanfiction could explore how these two concepts are related, perhaps with a character from RWBY finding out that their weapon has a hidden connection to the weapon - characters in Soul Eater.
Well, a cool concept could be the exchange of powers. Maybe Weiss could learn some of Soul Eater's magic - based combat styles and incorporate them into her Glyphs. And for Soul Eater characters, they could gain some knowledge about Dust from the RWBY world. Also, a plot where the two worlds start to merge slowly due to some mysterious force, forcing the characters to adapt and find a way to separate the worlds again.
One interesting Soul Eater RWBY fanfiction could be the ones that explore character crossovers. For example, how the characters from Soul Eater would interact with those from RWBY in a combat training scenario. They might learn new techniques from each other and form unexpected alliances.
The theme of friendship and teamwork also runs through many of these fanfictions. Just as in the original series, characters from RWBY and Soul Eater come together, and the fanfictions show how they build relationships, trust each other, and work towards common goals. This can include things like facing powerful enemies together or solving problems in the combined universes.
Another type of Soul Eater reader fanfiction involves the reader being from a different dimension. They get pulled into the Soul Eater world and have to adapt. This can lead to really cool crossovers in the story, like bringing in elements from the reader's home dimension and seeing how they clash or blend with the Soul Eater universe.
One interesting Soul Eater Soma fanfiction could be about Soma's adventures in a different dimension within the Soul Eater universe. Maybe he teams up with some unlikely allies and battles new and strange enemies.
One idea could be a fanfiction where the characters are transported to a modern-day world and have to adapt. For example, Maka and Soul having to go to a normal high school and deal with things like exams and social cliques while still maintaining their weapon - meister bond.
To write a good fanfiction, you need to focus on the dialogue. Make it sound natural for the characters. In RWBY, the characters often have a modern - sounding speech pattern, while in Soul Eater, there are some more outlandish and comical elements in the dialogue. Try to blend these styles in a way that feels right. Also, don't be afraid to add your own unique twists to the story, like a new type of Grimm that has characteristics inspired by Soul Eater's monsters.
There's 'RWBY and Soul Eater: A United Front'. This fanfiction focuses on how the teams from RWBY and the characters from Soul Eater would team up to face a common enemy. It's full of action and has some really cool fight scenes that combine the fighting styles of both franchises.
A great place to start looking for Soul Eater RWBY fanfiction is Archive of Our Own (AO3). It has a large collection of fan - made stories, and you can easily search for the specific crossover using relevant tags. There are also filters to help you find the most popular or recently updated ones.
One interesting fanfiction could be about Death the Girl's adventures in a parallel world where the rules of the Soul Eater universe are slightly different. Maybe she has to team up with unlikely allies to face a new kind of threat that endangers not just the DWMA but the entire world of the living and the dead.