How can the RWBY characters interact with Slenderman in a fanfiction?

The characters could interact through a portal that connects their two universes. For instance, Ben could be exploring different dimensions and stumble upon Remnant. Then he meets the RWBY team, and they start to exchange knowledge about their respective worlds.

Well, Ron might be initially terrified of Slenderman. But when his friends are in danger, he would step up. The Weasley twins could try to play pranks on Slenderman, not fully realizing the danger at first. Dumbledore, on the other hand, would be very cautious. He might observe Slenderman from a distance, trying to understand his nature before taking any action. In a 'Harry Potter and Slenderman fanfic', these interactions would create a lot of interesting scenarios.

They could interact through combat. For example, the Autobots' powerful blasters and physical strength could be combined with RWBY characters' unique weapon - based combat styles. The Autobots could provide cover fire while the RWBY characters get in close for more precise strikes.

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.

The characters can interact through combat cooperation. For instance, the Ghost Recon soldiers can teach the RWBY characters about stealth and tactical maneuvers. The RWBY characters, in turn, can show the Ghost Recon team their unique Semblance abilities. Blake could use her Shadow clones to confuse enemies, which might be a new concept for the Ghost Recon soldiers.

The gamer could interact with Ruby by showing her the unique weapons that can be created with UBW. Ruby, being a weapon enthusiast, would be extremely interested. They might also team up during battles, with the gamer using UBW to support Ruby's scythe - based combat style.

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 Stargate Atlantis characters are used to dealing with advanced technology and alien species. They might initially be very curious about the RWBY characters' abilities that seem almost like magic in comparison. For example, Sheppard might be intrigued by Yang's ability to absorb and release energy with her punches.

Ruby would be the most likely to engage with SCP fanfiction concepts in a positive way. She has an open mind and a sense of adventure. So she might see the SCPs as new challenges to face. Weiss would be completely against it. She values elegance and propriety in literature and SCP fanfiction doesn't fit that bill. Blake would look at the SCP concepts from a psychological angle. She'd wonder what makes people create such dark and complex entities. Yang would be all about the action. If there are strong SCPs in the fanfiction, she'd want to show them who's boss.

Weiss, with her more refined upbringing, could initially be a bit shocked by the differences in the Yamato's world but would soon start to find ways to use her skills. She might help with strategic planning, using her knowledge from Beacon Academy.