Definitely Harry and Eleven. Harry has his own special powers in the wizarding world, being able to speak Parseltongue and having the power of love that saved him from Voldemort. Eleven has her telekinesis and other abilities. They could learn from each other. Harry could teach Eleven about the different types of magic, and Eleven could show Harry how to use her powers in a more creative way. Another interesting pairing would be Hermione and Dustin. They're both super smart. Hermione could introduce Dustin to the vast library of Hogwarts and all the knowledge it holds, while Dustin could share his knowledge of science and technology with Hermione, and they could come up with some really cool ideas that combine magic and science.
One interesting pairing could be Luna Lovegood and Will Byers. Luna has her own unique view of the world and is very in - touch with the magical and the unknown. Will has been through a lot in the Upside - down and has a connection to that otherworldly place. They could have some really deep conversations about different dimensions and the nature of magic and the strange. Also, Ginny Weasley and Nancy Wheeler would be a great pair. Ginny is a strong - willed and talented witch, and Nancy is a brave and intelligent girl. They could team up to solve mysteries, whether it's about the secrets of Hogwarts or the strange happenings in Hawkins.
Steve and Ron would be a really fun pairing. Ron could introduce Steve to the wizarding world's food and traditions, and Steve could show Ron how to be a bit cooler and more confident in social situations. Also, Joyce and Molly Weasley would be an interesting pair. They are both strong mother figures, and it would be fascinating to see them bond over protecting their kids and dealing with the strange situations in both universes.
I think Eleven and Bill would make an interesting pairing. Eleven has her telekinetic powers and has faced otherworldly threats in the Upside Down. Bill is the leader of the Losers' Club and is very brave. Together, they could lead their respective groups in a fight against the combined threats of the Demogorgon and Pennywise.
Another great pairing could be Richie and Dustin. They both have a sense of humor that they use to cope with difficult situations. Richie's quick - witted remarks and Dustin's scientific knowledge could create some really interesting interactions. They could be the ones who try to figure out the scientific or otherworldly aspects of the crossover, like how the powers in Stranger Things relate to the strange entity that is It. Plus, their banter would be really entertaining.
Betty and Eleven would make an interesting pair. Betty has her own dark secrets and determination in Riverdale, and Eleven has her powers and a past full of mystery in Stranger Things. They could help each other out in different ways, like Betty helping Eleven understand normal human relationships, and Eleven using her powers to protect Betty when she's in danger.
Definitely Eleven and Captain America. Steve's leadership and moral compass combined with Eleven's raw power would be a great combination. They could inspire each other in different ways.
Hermione Granger and Rukia Kuchiki could make a great pairing. Hermione is extremely intelligent and well - versed in magic theory. Rukia, on the other hand, has a deep understanding of the spiritual world. They could collaborate on researching a strange phenomenon that is occurring between the two worlds, like a merging of certain spells and Soul Reaper techniques. Their different personalities would also create some interesting interactions, with Hermione being more outspoken and Rukia more reserved.
I think Buffy and Hermione would make an interesting pairing. Hermione's intelligence and knowledge of magic combined with Buffy's combat skills could lead to some great adventures. They could learn a lot from each other.
Hermione and Death could be an interesting pairing. Hermione is known for her intelligence and thirst for knowledge. Death, being an all - powerful entity in the Darksiders universe, could have a lot of knowledge that Hermione would be eager to learn. Their conversations would likely be deep and thought - provoking as she tries to understand the nature of death from his perspective.
Harry Potter and Lucy Pevensie would make an interesting pairing. Harry is used to being the hero in his own world, but Lucy has a unique kind of innocence and faith in Narnia. They could learn a great deal from each other. Harry could teach Lucy about more complex forms of magic, while Lucy could show Harry the power of believing without seeing, which is a big part of her relationship with Aslan.
Another great pairing would be Hermione and Bruce Banner. Hermione is extremely intelligent and book - smart, and Bruce Banner is a brilliant scientist. They could collaborate on studying the differences and similarities between magic and science. Hermione could help Bruce understand the complex theories behind magic, and Bruce could explain to Hermione some of the advanced scientific concepts he's been working on. Also, when Bruce turns into the Hulk, Hermione could use her magic to try and control or at least direct the Hulk's power in a more useful way.