In a fanfic, the Ghostbusters would bring their no - nonsense attitude towards ghosts to Hogwarts. They might not be as intimidated by the Hogwarts ghosts as the students are. Harry Potter and his friends would learn some new ways of thinking about dealing with the supernatural from the Ghostbusters. For example, instead of using spells all the time, they could use some of the Ghostbusters' tactics. And the Ghostbusters would have to adapt to the more magical and sometimes less logical rules of the wizarding world.
The Ghostbusters would probably be really confused at first when they enter Hogwarts. They might start trying to figure out how all the magic works. Harry Potter and his friends would be equally curious about the Ghostbusters' equipment. Hermione would probably be asking a million questions about how the proton packs work. And the Ghostbusters would be shocked by things like the moving staircases and portraits that talk.
Well, Harry could be really curious about Luffy's Devil Fruit powers. He might ask Luffy a lot of questions about how it works and if there are any limitations. Luffy, on the other hand, would probably be excited to see Harry's magic. He'd likely want Harry to show him all kinds of spells.
The characters would have very different cultures and ways of life. For example, the Hobbits are used to a simple, rural life with lots of food and comfort. The Hogwarts students might find this quite strange at first. But they would soon realize that the Hobbits' simple ways also hold great wisdom. Frodo, being a brave Hobbit, would likely be respected by Harry Potter for his courage in carrying the One Ring. Harry, in turn, could show Frodo some of the amazing magic in the wizarding world.
If we consider an encounter between them in a fanfic, Ichigo would likely be very cautious around the Arrancar at first. He has fought them before in his own world and knows their power. In the presence of Harry Potter and his friends, Ichigo would be curious about their magic. Harry, in turn, would be amazed by Ichigo's sword and his ability to fight spirits. The Arrancar might view the wizards as a new source of power or a threat, depending on their motives. For example, an Arrancar might try to steal a wizard's magic for themselves.
In a fanfic, Draco Malfoy would probably look down on the Addams family at first, seeing them as 'weird' and not up to his pure - blood standards. But the Addams family wouldn't care about his snobbishness at all. Instead, they would just be themselves. Morticia might even make Draco a bit uncomfortable with her elegance and mysteriousness. And the Addams family's pets, like Thing, could cause some chaos in Hogwarts, which would be both amusing and a bit of a headache for the Hogwarts staff.
In a fanfic, the interaction could start with confusion. The Date A Live characters suddenly find themselves in a world full of magic, and the Harry Potter characters are faced with beings that seem to have powers they've never seen before. Harry could help the Date A Live characters understand the basic rules of the magic world, like not using magic in front of Muggles. The Date A Live characters could share their own experiences of dealing with threats in their world. Over time, they could form alliances based on mutual respect and the need to face common enemies.
The Stargate characters are used to dealing with advanced technology and alien cultures. When they meet the Harry Potter characters, they might be initially confused by magic. For example, Jack O'Neill might be both amused and intrigued by the spells the wizards cast. Meanwhile, Harry Potter and his friends would be curious about the Stargate technology and the different worlds it can access.
The characters would interact in very strange ways. The Hogwarts students would be shocked by the Jackass crew's behavior. The Gryffindors might be initially intrigued, while the Slytherins would be disdainful. Harry and his friends would probably try to keep the Jackass guys out of trouble, but it would be difficult as they are always looking for the next wild thing to do.
Harry might be in awe of Elsa's powers at first. He would likely approach her with caution and respect, as he does with most powerful beings. Elsa, on the other hand, would be curious about Harry's world of wands and spells. They could start by sharing their stories. Harry would talk about Voldemort and his battles, and Elsa would share her experiences with her frozen kingdom and her isolation.
Hermione would probably be very interested in the historical and magical aspects of King Arthur's time. She might study the old magic used by Merlin and try to apply it to her own spell - casting. For example, if Merlin had a spell for weather control, Hermione would be eager to learn how it worked and if it could be adapted to modern wizarding needs.
Harry could interact with Belle in an interesting way. He would probably be intrigued by her love for books and knowledge, just like he is. They could share stories of their different worlds, with Harry talking about Hogwarts and Belle about her village. The Beast, on the other hand, might be initially suspicious of Harry, but as he sees Harry's good intentions, they could become comrades. For example, Harry could teach the Beast some basic self - defense spells in case of any future attacks.