I think Weiss could be the most interesting. Her strict upbringing and refined combat style from RWBY would contrast greatly with the rough - and - tumble nature of the Halo universe. She might struggle at first to adapt but then use her intelligence and Glyph - based powers to come up with some really cool strategies against the Halo enemies.
I think Yang would be the most interesting. Her hot - headed and powerful personality would fit well in the Doom setting. She'd be charging into battles with the demons, using her Ember Celica to blast them away. And her ability to get stronger when she's angry could be a great asset in the high - intensity combat of Doom.
Ruby would be really interesting. Her speed and enthusiasm would make her stand out in the For Honor battles. She'd be eager to learn all the new combat moves and would probably be the first to charge into a fight, her scythe whirling in the For Honor arenas.
I think Yang would be great. Her fiery personality and powerful punches would be a force to be reckoned with in the Battlefield setting. She could be the one charging into enemy lines, taking out multiple foes at once, and really showing off her combat skills in this new and different kind of battlefield.
Yang from RWBY would be another interesting choice. Her fiery personality and powerful punches could bring a different kind of energy to the Halo Wars universe. She might get into some interesting battles with the Covenant, using her brute strength and her Semblance of absorbing damage to become even stronger in combat.
I think Weiss might be the most powerful. Given her intelligence and magical abilities in RWBY, she could easily understand the complex mechanics of Pokemon training and battles. Also, she could potentially use her Glyphs in creative ways to enhance her Pokemon's performance in battles.
Ruby Rose would be really interesting. Her speed and scythe - wielding skills could be a unique addition to the Halo battles. Plus, her positive attitude might inspire the Halo characters.
Ruby and Master Chief could be a great pairing. Ruby's enthusiasm and quick - thinking could complement Master Chief's stoic and strategic nature. They could learn from each other's combat styles and leadership skills during battles against the combined threats of Grimm and Covenant.
Ruby would be a likely candidate. She is the leader of the RWBY team in their own universe, and she has a natural ability to inspire others. Her quick thinking and combat skills would also be valuable in the Battlefield 1 setting. She could quickly assess the situation on the battlefield and make decisions on where to move the team and what objectives to pursue.
The plot might involve the RWBY team being mistaken for some sort of new Halo soldiers. They could be put through training regimes in the Halo world, which would be really interesting to see as they adapt their own fighting styles to Halo's more military - based combat. Their semblances could also create some chaos or new strategies within the Halo battles. For example, Weiss' glyphs might interact in unexpected ways with Halo's energy shields.
I think Master Chief and Captain America would be an interesting pairing. Master Chief is a super - soldier in his own right from a high - tech future, while Captain America is a super - soldier from the past. Their different combat styles and values would create an interesting dynamic.