Well, Ruby's admiration for power and new techniques would make her eager to learn from Doctor Strange. She'd watch his every move, hoping to incorporate some of his magic into her own fighting. Weiss, being from a wealthy and influential family, might initially be a bit skeptical of this strange new arrival but would soon see the value in his magic. Yang would be excited to see what kind of punches and attacks Doctor Strange could handle. And Blake would see in him a kindred spirit in a way, as someone who has overcome great challenges through his own power and knowledge. Doctor Strange would be intrigued by their youth and enthusiasm, and would gradually form a bond with each of them as they face various challenges together in the RWBY universe.
The RWBY characters are used to a world full of Grimm and Huntsmen. When Doctor Strange arrives, his different style of magic and his more 'cosmic' view of things would be a shock. For example, he might use his magic to create portals, which could be used for both transportation and as a weapon. The RWBY team would have to adapt to this new form of combat. Doctor Strange, on the other hand, would have to understand the RWBY characters' reliance on Dust and their team - based combat. He might find their loyalty to each other and their cause quite inspiring and adjust his own actions accordingly.
Sherlock could be highly skeptical of Doctor Strange's magic at first. He might constantly try to find logical explanations for the magical phenomena. Doctor Strange, in turn, could be amused by Sherlock's attempts and then gradually show him the true power of magic. For example, Strange could use his magic to recreate a crime scene in a different way to help Sherlock see new angles of a case.
One idea could be that Doctor Strange somehow gets transported to the RWBY universe. Maybe he's there to help deal with a powerful Grimm that has magic - like abilities that the normal Huntsmen and Huntresses can't handle. He could use his magic to teach the RWBY characters new ways of fighting and also learn a thing or two from them about their unique combat styles.
RWBY characters might initially be confused by Earthlings' lack of knowledge about Dust and Semblances. They could start by trying to educate some curious Earthlings about their world. For example, Ruby might show off her Crescent Rose to a group of engineering students, who are fascinated by its design.
The characters would likely have an initial period of confusion. The Warframe Tenno, being used to their own high - tech battles, might be startled by the more 'primitive' but still effective weapons of RWBY. Meanwhile, the RWBY characters could be in awe of the Warframes' advanced abilities. For example, when a Warframe uses teleportation, the RWBY team would be both amazed and a bit suspicious. Eventually, they would start to work together, with the Warframes teaching the RWBY characters about advanced combat tactics and the RWBY characters showing the Warframes the ins and outs of their world.
Ruby would probably be very excited to meet Geralt. She might ask him a million questions about his adventures and his weapons. Geralt, on the other hand, would be more reserved but would respect Ruby's enthusiasm. Blake might be a bit cautious around the Witcher at first, but would soon be interested in his knowledge of different creatures. Yang would be eager to spar with Geralt to test her strength. And Weiss would be curious about the Witcher's magic and how it compares to her own Glyphs.
Well, Yang could use her Ember Celica to blast away at Terminators. Her powerful punches combined with the shotgun blasts might be able to damage their metal exoskeletons. Weiss could use her Glyphs to try and immobilize the Terminators, creating barriers or traps to slow them down. Blake could use her shadow clones to confuse the Terminators and then strike from unexpected angles.
The characters could start off as enemies. The Horsemen might be seen as threats by the RWBY characters because of their intimidating appearance and their connection to destruction in the case of War. But then they could discover a common goal, such as stopping a powerful entity that is causing chaos in both worlds. They would then have to learn to work together, with the RWBY characters teaching the Horsemen about their world and vice versa.
Edward Elric from Fullmetal Alchemist would probably be very curious about the unique abilities in RWBY, like semblances. He might try to study them from an alchemical perspective. Ruby, on the other hand, would likely be in awe of Edward's alchemy skills and his mechanical arm and leg. She could see him as a kind of mentor in a way.
Well, Ruby's speed semblance could be a great complement to Spiderman's acrobatics. They could perform some amazing parkour - like stunts together. Yang's semblance of getting stronger with each hit could be combined with Spiderman's strength. Imagine Yang taking a few hits and then teaming up with Spiderman for a super - powerful attack. And Weiss's ability to create glyphs could be used to enhance Spiderman's web - swinging. She could create glyphs that make the webs stronger or more elastic, allowing him to swing further and faster. Blake's stealth and acrobatic skills could also work well with Spiderman's, as they could both silently take out enemies from the shadows.
Well, if Spider - Man met Ruby, he'd probably be intrigued by her enthusiasm and her weapon, Crescent Rose. Ruby, in turn, would be in awe of Spider - Man's powers. They might start off a bit cautious around each other, but once they realize they're both fighting for good, they'd become friends quickly. Spider - Man could teach Ruby some new acrobatic moves, and Ruby could show Spider - Man how to better use his environment in combat like she does in the RWBY world.