Since it's a fanfic, the author could introduce new characters specifically for this story about the ancient bomb. Maybe there's an old sage - type character who knows the secrets of the ancient bomb and guides the main RWBY characters. Or there could be a group of treasure hunters who accidentally stumble upon the bomb and then have to deal with the consequences, and they could become important characters in the fanfic.
It's possible that some of the villains from RWBY could also be main characters in this fanfic, especially if they are after the ancient bomb. For instance, Cinder Fall or Salem might be interested in the power of the ancient bomb and be the main antagonists in the story. Their actions and the heroes' responses to them would then form the core of the plot.
I'm not sure as it depends on the author of the fanfic. But it could be the main RWBY characters like Ruby, Weiss, Blake, and Yang. They are often the central figures in RWBY - related stories, so they might be the ones dealing with the ancient bomb.
Well, without reading it specifically, it could be about an ancient bomb in the RWBY universe. Maybe it's a powerful weapon from the past that has been long forgotten and the story could revolve around how the characters discover it, what its capabilities are, and how it might change the power balance in their world.
Perhaps there are also some new characters introduced specifically for this fanfic, characters who have a special connection to the ancient gods. They could be guides or guardians of the ancient god lore.
Ruby could be a main character. Given her leadership skills and her connection to the silver - eyed warriors, she might be on a quest to uncover the secrets of the ancient kingdom that could be related to her powers. Weiss could also be a main character as her family has a long history, and she might discover some link between her family's past and the ancient kingdom.
Ruby could be one of the main characters. Given her leadership skills and her inquisitive nature, she would be drawn to the mystery of the ancient nuclear weapon. She might see it as a potential solution to the Grimm problem or, on the contrary, as a great danger that needs to be stopped.
Obviously Naruto would be the main character as it's a Naruto - related fanfic. But other characters like Sasuke could also be important. Sasuke might be initially skeptical of Naruto's new spirit bomb - like ability or could even be jealous. Sakura could play a role in helping Naruto master this new power, maybe by using her medical ninjutsu to keep Naruto in top shape during his training.
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.
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.
Well, Ruby Rose is likely to be one of the main characters as she is a central figure in the RWBY universe. Her leadership skills and combat abilities would surely play a role in the fanfic's story.
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.
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.