Most likely, Ruby, Weiss, Blake, and Yang are still main characters as they are the core of RWBY. However, in a 'two for one' fanfic, there might be some new characters that are given equal importance. These new characters could be original creations of the fanfic author, designed to complement the existing RWBY characters. For example, a new character who has a special connection to Ruby's silver eyes power might be introduced and become a central figure in the story.
It's also possible that some side characters from the original RWBY series are elevated to main character status in the fanfic. Maybe a character like Penny, who was a supporting character in the show, has a much more significant role in the fanfic. She could be involved in a major plotline that changes her relationship with the other characters and makes her a key part of the story's development.
Obviously, Artyom would be one of the main characters. And then there would likely be the main RWBY characters like Ruby, Weiss, Blake, and Yang. They might interact with Artyom in different ways. For instance, Ruby could be curious about Artyom's weapons or his background.
It's also possible that the fanfic could focus on side characters from RWBY but in a new light related to the'shine' concept. For example, Penny could be a central character in the 'rwby shine fanfic' if the story is about how her robotic nature can shine in a different way, like her circuits starting to glow with a new kind of energy that changes her abilities and her role in the RWBY universe.
Well, of course, Emiya is one of the main characters. He brings his own set of skills, like his swordsmanship and his ability to project weapons. Then there are the RWBY characters such as Ruby Rose. Ruby is a key figure as she is the leader of Team RWBY. Her innocent yet determined nature often clashes or combines interestingly with Emiya's more stoic and experienced personality.
Well, it likely still features the main characters from RWBY like Ruby, Weiss, Blake, and Yang. But in the context of redemption, perhaps there are new characters or side characters who play a crucial role in their journey towards redemption. Maybe an old enemy who now has a change of heart and becomes an ally.
I assume Rose and Bird are the main focus. However, in RWBY - related fanfics, there are often other characters from the RWBY universe that interact with the main ones. So perhaps characters like Ruby, Weiss, Blake, and Yang could also make appearances in 'rosebird rwby fanfic' and play supporting roles or be part of the overall plot in some way. Maybe there are also antagonists in the fanfic that are either new or based on existing RWBY villains.
There could also be new characters introduced in the RWBY Gods fanfic. Maybe a character who has a special connection to the Gods, like a prophet or a chosen one from a long - forgotten tribe. This character could play a crucial role in bridging the gap between the RWBY characters and the Gods.
Most likely, the main characters would be Ruby, Weiss, Blake, and Yang, as they are the central characters in RWBY. In the 'gamer fanfic' version, they would be the ones experiencing the game - like elements.
Typically, Ruby, Weiss, Blake, and Yang are still main characters in 'immortal rwby fanfic'. Their characteristics might be enhanced or changed due to the immortality factor. For instance, Ruby's leadership skills could be further developed over time. Weiss may use her long life to master more complex magic. Blake could have more time to fight for equality in different historical periods, and Yang's strength and determination might reach new levels as she has all the time in the world to train.
It's hard to say without actually reading the fanfic, but most likely the main characters from RWBY, like Ruby, Weiss, Blake, and Yang, would be involved. They might be the ones dealing with the new nuclear elements introduced in the fanfic.
Blake and Yang are also likely to be main characters. Blake with her shadow - like powers and Yang with her strength and her relationship with Ruby. Their interactions and individual growth are usually important aspects in RWBY stories, including this fanfic.