Often, they have unique physical features related to their faunus type. For example, cat - like faunus might have ears and a tail. They also tend to be strong - willed. Since faunus face discrimination in RWBY, female faunus OCs usually have to be tough to survive and prove themselves.
Maybe a fanfic where Weiss discovers a hidden Faunus community while exploring. She gets separated from her team and has to rely on the Faunus there to survive. This experience makes her re - evaluate her thoughts on Faunus. The Faunus in the community could have unique cultures and abilities that Weiss has never seen before, and she becomes fascinated by them.
One great Bumbleby Spider Faunus fanfic is 'The Web of Destiny'. It beautifully weaves the story of the characters with their Faunus traits. The relationship between Blake and Yang is developed in a really engaging way. The author does a wonderful job of describing the spider - like abilities of the Faunus characters and how they interact with the world around them.
I'm not entirely sure as I haven't read this specific fanfiction. But it might be a story where Naruto is somehow placed in the world of Grimm Faunus, perhaps with Naruto having to adapt to the new environment, new powers related to being a Faunus, and facing the threats that come with the Grimm in that universe.
I really like 'Weiss and the Faunus Bond'. In this fanfiction, Weiss discovers the unique aspects of Faunus culture through her interactions. It shows her growth as a character as she overcomes her initial prejudices. It also has some great action scenes intertwined with the emotional development.
It could be really interesting. Naruto with the traits of a faunus would bring a whole new dynamic. Maybe he'd have some animal - like features that would enhance his ninja abilities. For example, if he was a fox - type faunus, it could tie in with the nine - tailed fox inside him in a unique way.
One idea could be a story where Ruby, as a Faunus, has to hide her identity in a world that's still somewhat prejudiced against Faunus. Weiss discovers her secret and at first is conflicted because of her family's traditional views. But as they go on adventures together, Weiss realizes that Ruby is still the same brave and kind person she always knew, and they form an even deeper bond.
I'm not entirely sure specifically as there could be many different interpretations in such a fanfiction. It might involve Naruto in a world related to the Faunus concept, perhaps with Naruto having god - like powers within that context. Maybe he uses his skills to protect the Faunus or change their situation in some way.
Faunus in Naruto and RWBY fanfiction can be used to explore themes of discrimination. In RWBY, Faunus face discrimination, and this can be paralleled in the Naruto universe. Fanfiction might show Faunus being treated like the Jinchuriki or the Uchiha clan, who were also ostracized. They could be fighting for equality in the Hidden Leaf Village or other ninja villages, just like they do in RWBY's Vale or other kingdoms.