One common theme is the clash of cultures. Naruto comes from a world of ninjas and the RWBY characters are from a more modern - fantasy world. So, there's often a theme of how these two different cultures interact.
Well, in some 'killer naruto rwby fanfiction', Naruto is a sort of anti - hero. He has to survive in the RWBY world which is full of its own set of challenges. He might use his shadow clone jutsu to outwit the enemies. And his chakra control allows him to do things that the RWBY characters find quite amazing. This type of fanfiction often explores how two very different fictional universes can collide and create a whole new story.
Yes, there might be. The RWBY fandom is quite large and diverse, so it's possible that some fans have created fanfictions with such a dark and disturbing concept involving Ruby as a serial killer. However, this kind of fanfiction may not be very common as it goes against the typical heroic portrayal of Ruby in the original series.
Even a new character created specifically for the fanfiction could be the serial killer. This character could be someone with a grudge against Beacon Academy, for instance. They might be killing students or professors in a way that ties into some dark secret or vendetta they have against the institution.
Well, it could be about a darker, more twisted version of Ruby from RWBY. Maybe it involves Ruby taking on a more villainous or morally ambiguous role. It might explore different scenarios where she uses her skills in unexpected and perhaps unethical ways.
You can start by looking at popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). On FanFiction.net, use the search bar and type in 'Naruto RWBY' to get a list of relevant fanfictions. AO3 also has a great search function where you can narrow down your search by tags such as 'crossover' if you're specifically interested in stories that combine the Naruto and RWBY universes. Another option is to join Naruto or RWBY fan forums and ask for recommendations on good Naruto RWBY fanfictions there.
You could make your OC have a special power related to speed. They could be faster than any of the RWBY characters, which would make for some exciting fight scenes. Their motivation could be to avenge their family who were killed by Grimm. In the fanfiction, they start out as a loner but gradually form bonds with the main RWBY characters as they realize they have a common enemy.
One common theme could be the corruption of Ruby's character. It might explore what could drive her to become a serial killer, like perhaps some dark force or extreme psychological trauma. Another theme could be the reaction of the other RWBY characters to this unexpected and horrifying change in Ruby.
Well, it's possible. The RWBY fandom is vast and diverse, and fans often come up with unique and sometimes dark concepts. To find 'RWBY Ruby Serial Killer' fanfiction, you could look on popular RWBY fan forums. There, fans might discuss or even link to such works. But remember, this kind of fanfiction is not for everyone, as it distorts the character of Ruby in a very extreme way.
One common theme could be the mystery surrounding the serial killer. In RWBY fanfiction, it might involve the characters trying to figure out the identity of the killer within the unique world of Remnant. For example, they could be investigating strange murders that seem to have a pattern related to Grimm activity or Dust usage.