How could Ruby's transformation into a Grimm be explained in RWBY fanfiction?

Yes, there might be. The 'RWBY' fandom is quite large and diverse, so it's not surprising that there could be a fanfiction with such an interesting concept as Ruby being part Grimm. It could explore a whole new side of her character and the story's lore.

One possible plot could be Ruby initially trying to hide her Grimm part from her friends. As she struggles with newfound abilities and instincts, she has to constantly fight the urge to give in to the Grimm side. Meanwhile, a powerful enemy emerges that she might be uniquely suited to defeat because of her Grimm part, but she has to first come to terms with it herself.

Well, it could be about Ruby struggling to hide her true nature as a Grimm Faunus while still being a Huntress. Maybe she has to deal with the prejudice from others who fear Grimm Faunus.

If Ruby becomes a Grimm in RWBY, it would be a total chaos. Her friends would be shocked and confused. They might initially try to save her, thinking there's still a chance to reverse the transformation. But she, as a Grimm, would likely have new instincts and powers that are contrary to her former self. Her combat style could change completely, and she might become a threat to those she once protected.

Well, a possible plotline could start with Ruby being somehow infected or cursed to become a Grimm. She would then experience a whole new set of emotions and abilities. Maybe she starts to have visions or dreams related to the Grimm's origin or their purpose. As she tries to understand what has happened to her, she might be ostracized by some of her friends who are afraid of her new form. However, a few might believe in her and help her. She could then try to use her new Grimm - like abilities, such as enhanced strength or stealth, to fight against a greater evil that is threatening both the Grimm and the people of Remnant. Along the way, she could learn more about the true nature of the Grimm and find a way to either reverse her condition or fully embrace it in a way that benefits everyone.

Well, popularity can vary. In the RWBY fanfiction world, there are so many different themes and concepts. While the idea of Ruby being a Grimm in a fanfiction is quite different and could potentially be interesting. However, it might not be as mainstream as some other common fanfiction themes like Ruby's relationships with her team members. So, it may not be extremely popular, but it could have a dedicated following among those who like more edgy or unique storylines.

Well, Ruby might first be very cautious. She could use her Crescent Rose to keep a safe distance while observing the baby Grimm's behavior. Maybe she tries to figure out if it has any special needs like food (although it's a Grimm, which is strange to think about food for them).

The Grimm mask could also make Ruby more empathetic towards Grimm in a strange way. Since she's wearing something that was once part of a Grimm, she might start to understand them a little better. This could lead to her trying to find non - violent ways to deal with Grimm, which would be a big shift in her character as she was always more about fighting them before.

I'm not entirely sure if there is a specific 'RWBY Ruby is a Grimm Faunus' fanfiction. However, given the creativity of RWBY fans, it wouldn't be a surprise. Some fanfictions explore really out - of - the - box ideas, and this could be one of them. You could also check RWBY - related forums where fans might discuss or share such unique fanfictions.

Another plot could be that the Grimm mask was once a part of an ancient weapon or a powerful relic. Ruby discovers it and realizes that it has a connection to the origin of Grimm. As she delves deeper into the mystery of the mask, she uncovers long - forgotten knowledge about the creation of Grimm and how to potentially stop them for good.