They might be confused at first. RWBY has its own unique lore and concepts that are different from many anime. So anime characters may need time to understand things like Grimm and Huntsmen. For example, if Goku from Dragon Ball was watching, he'd probably be like 'What are these strange monsters?'.
There are also those anime characters who might be critical. They have their own standards for a good story. So they could point out plot holes or unrealistic parts in the RWBY fanfiction. Maybe Light from Death Note would be analyzing the logic and the consequences of the actions in the fanfiction.
Some anime characters could be really excited. If they are fans of action - packed stories, RWBY fanfiction would be appealing. Characters like Ichigo from Bleach might enjoy seeing the RWBY characters' sword - fighting skills and their unique powers. He might even get some inspiration for his own battles.
Kakashi would be very observant. He would look for how the fanfiction writers understand the world of Naruto, the values and the moral lessons. He might even use some of the creative ideas from the fanfiction in his own teachings if he thought they were valuable and in line with the spirit of the original story.
Some of them might be excited to see new stories in a different superhero universe. For instance, Ruby might be really into it, seeing the unique quirks as something cool and inspiring.
Ruby would be super excited. She loves all things RWBY and the chibi fanfic would be like a new adventure for her. Yang would laugh a lot, enjoying the comical take on their lives. Weiss might be a bit shocked at first but then get into it. Blake would be quietly observing and probably find some parts that really resonate with her character.
Many RWBY fans would appreciate the creativity in Star Wars fanfiction. They know how important fan - created content is for their own RWBY community. So they would respect and enjoy the creativity of Star Wars fans in writing these fanfictions. They could also learn new ways of storytelling and world - building from it.
Some might be amused. Naruto characters have their own set of stories and adventures, and seeing the different and often wild ideas in RWBY fanfiction could be a source of entertainment for them.
In 'rwby watches earth fanfiction', Ruby would be wide - eyed and eager to explore every new thing. She'd be constantly asking questions about how things work. Weiss would be shocked by the lack of a Dust - based power system but would soon start to admire Earth's ingenuity. Blake would be drawn to the underground subcultures on Earth, like punk or goth cultures. Yang would be amazed by the variety of fighting styles on Earth, from martial arts to boxing. They all would have to come to terms with the fact that Earth is a very different place from Remnant.
Some might laugh. They could find the humorous takes in the fanfiction really entertaining. Maybe there are some comical interpretations of their actions or dialogues that they themselves didn't expect.
Some characters might be shocked. They may not expect such wild interpretations of their lives and relationships.
Naruto would be thrilled. He loves being the center of attention and seeing all these stories about him would make him feel even more important. He'd probably want to meet the writers and tell them how cool he thinks their ideas are.
Some characters might laugh. They would see the humorous side of how fans have twisted and turned their stories. It could be like seeing a new, comical version of their own lives as depicted in the musical.