Spider - Man would probably be really curious about the Demon Slayers' powers. He might be constantly asking questions about their breathing techniques. And the Demon Slayers would be amazed by Spider - Man's superhuman abilities like climbing walls and shooting webs.
Tanjiro would likely befriend Spider - Man quickly. He would see Spider - Man as another person fighting for good. Spider - Man, on the other hand, would be intrigued by Tanjiro's sense of smell and how he can detect demons. They could exchange stories of their battles and learn from each other's fighting styles. The more hot - tempered Demon Slayers might initially be a bit wary of Spider - Man, but once they see him in action against demons, they would accept him as an ally.
The interaction between Spider - Man and the Hashira would be quite interesting. The Hashira, being the top Demon Slayers, would be both impressed and perhaps a bit jealous of Spider - Man's unique powers. Spider - Man would respect their skills and authority. He might try to learn from their strict discipline and training methods, while the Hashira could gain new perspectives on combat from Spider - Man's unorthodox fighting style that combines acrobatics and web - based attacks.
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.
The interaction would be really interesting. Spider - Man, being from a different world, would bring a new perspective to the RWBY characters. For instance, he could teach them about his concept of 'with great power comes great responsibility'. Weiss might be a bit snobbish at first towards Spider - Man, but as she sees his heroics, she would come to respect him. And Spider - Man would have to adapt to the different social hierarchies in the RWBY world. He might find the Faunus situation quite different from what he's used to in his own world and try to help promote equality in Remnant.
Well, Peter Parker might be really curious about Ladybug's powers. He'd probably ask her a lot of questions about how her Miraculous works. Ladybug, on the other hand, would be interested in Spider - Man's scientific gadgets. They could exchange knowledge and techniques.
Let's think about Bakugo's Explosion Quirk and Spider Man's powers. Spider Man could use his webs to contain and direct Bakugo's explosions in a more controlled way. Bakugo could learn from Spider Man's stealth and how to approach enemies more quietly before unleashing his explosive attacks. Also, Spider Man's spider - sense could help him anticipate Bakugo's more impulsive attacks and react accordingly.
The superfamily could interact with Spider - Man in a more helpful way. For instance, if Spider - Man is injured during a fight, Peter's family in the superfamily could offer him shelter and medical help. They might also use their own unique skills (maybe one is good at making gadgets) to help Spider - Man improve his suit or his web - slinging abilities.
Scarlet Witch could potentially enhance Spider - Man's physical abilities using her magic. She could make his strength even greater or his speed faster for a short period. In return, Spider - Man could protect Scarlet Witch from close - range physical threats. His ability to swing around the city quickly could also be useful in getting her to different locations where her magic is needed.
One interesting crossover could be Spider - Man using his web - slinging abilities in the Demon Slayer world to quickly move around and help the Demon Slayers. He could use his enhanced strength to take on powerful demons that the Demon Slayers might struggle with.
They could interact in a very interesting way. Spider Man might be in awe of Wonder Woman's strength and her noble presence. He would probably crack some jokes to lighten the mood, which Wonder Woman might find either endearing or a bit strange at first. She, on the other hand, could be a bit stern with him but also respect his courage and his ability to fight despite not having super - strength like her.
Harry would probably be a bit of an outcast at first. The other students at Hogwarts might not understand his strange powers. Hermione would be curious and try to research if there was any magical explanation for it. Ron might be a bit jealous at first but then come around. And the teachers, like Dumbledore, would be very watchful. He would likely try to guide Harry in using his powers for good and not let them cause chaos in the wizarding world.
Spider Man would probably be very protective. He'd use his agility and strength to keep the kid out of danger. For instance, if they were in a fight scene, he'd quickly web - sling the kid to a safe place.