Ruby is often involved. Since she's the main protagonist in RWBY, it makes sense for her to interact with Nightcrawler in fanfictions. Their different powers and personalities can create interesting dynamics.
Blake is another likely character. Her stealthy nature and Nightcrawler's ability to move around unseen could be explored. Maybe they team up to carry out some secret missions within the RWBY world, and along the way, they have deep conversations about their pasts and what they're fighting for.
Obviously, the Reaper is a main character. Ruby Rose is also often involved as she is one of the central characters in RWBY and her connection to the concept of death (which the Reaper represents in a way) makes for interesting interactions. Weiss Schnee can also be seen in some fanfictions, as her family's past and her own story can cross paths with the Reaper's storyline in creative ways.
Weiss Schnee could also be involved. Her haughty attitude in the beginning could lead to situations where she is humiliated. For instance, if she makes a wrong assumption about someone and is then proven wrong in a very public way.
Often in 'halo scarab rwby fanfiction', Ruby and her friends are main characters. Ruby, as the protagonist of RWBY, has the drive to explore and face new challenges, which the Scarab represents. Halo's Arbiter could also be a main character. His unique backstory and combat skills could add an interesting dynamic. Blake, with her stealth and intelligence, would be important too. She could be the one to gather information about the Scarab or any threats associated with it. And Weiss, with her ice - based powers, could be crucial in combat situations against the Scarab or its related foes.
Weiss Schnee is another character. Given her complex family situation with her overbearing father and the whole Schnee family legacy, fanfictions can delve into how she reconciles her family ties with her own goals and values in the world of RWBY. She might try to break free from her family's negative influence or find a way to redeem her family name.
Ruby Rose is often involved. Her speed and scythe - wielding skills can be really useful on a Dreadnought battleship, whether it's for fighting Grimm or helping with ship - related tasks. Weiss Schnee is also common. Her ice powers can be used for defense or to cool down overheating ship systems.
We might also see other RWBY characters like Weiss, Blake, and Yang. They could be involved in the story to support Ruby or have their own sub - plots related to Ruby's encounter with the Grimm.
Ruby is often a central character in sacrifice - related stories. Given her leadership role and her powerful Silver - eyed Warrior abilities, she might be put in situations where she has to sacrifice something for the greater good. For example, she could sacrifice her own safety to buy time for her team to escape a dangerous situation.
Ruby's sister Yang is very likely to be involved. Yang is protective of Ruby, so if the ruby slippers put Ruby in any sort of danger, Yang would be right there. Crescent Rose, Ruby's weapon, could almost be considered a character in a sense in these fanfictions. Since the slippers' power might interact with Ruby's fighting style and thus her weapon. And then there are the villains from the RWBY universe, such as the Grimm, who could be attracted to the power of the slippers and constantly be a threat to Ruby while she has them.
Ruby Rose is often involved. Given her role as a main character in RWBY, it's easy to imagine her having some sort of encounter or connection with the God of Light. Her silver eyes, which already have special significance in the series, could be further explored in relation to the God of Light.
Yang is another character often seen in'mind control rwby fanfiction'. Her hot - tempered nature and her love for her sister Ruby can create interesting storylines when she's under mind control. For instance, she might be made to fight Ruby without realizing it. And Cinder could be the one causing the mind control in many of these stories, as she's a major antagonist in RWBY and has the power and motivation to manipulate others in this way.