Hermione Granger would also be likely to interact. She is curious and intelligent. She would be interested in learning about Starscream's technology and might try to find a way to incorporate it into the wizarding world's knowledge. She could also use her vast magical knowledge to negotiate with Starscream if he ever posed a threat.
Harry Potter himself is a likely candidate. Given his heroic nature and penchant for getting involved in dangerous situations, he might be the one to first encounter Starscream. His experience with facing dark wizards could give him some skills to deal with the unpredictable Starscream.
Hermione and Betty would be likely to interact. Hermione's intelligence and thirst for knowledge could pair well with Betty's investigative nature. They could work together to solve a mystery that spans both the wizarding world and Riverdale.
Well, Starscream is obviously one of the main characters. And then there's the pet, which could be any number of things. It could be a small robotic creature, in which case the creator of that pet or the one who sent it to Starscream could also be important characters.
Well, Megatron would probably be conflicted. On one hand, he's a powerful leader and this unexpected situation might make him feel like his authority is being challenged in a strange way. Starscream, on the other hand, would be in a vulnerable position yet also see an opportunity. He might try to manipulate Megatron with the pregnancy. Other Decepticons would likely gossip and some might try to take advantage of the situation to undermine both Starscream and Megatron.
Harry Potter himself could interact with Sophie from Huntik. Harry is used to facing great challenges and having a strong sense of justice. Sophie, with her connection to the Titans, could find common ground with Harry in their fight against evil. They could learn from each other's worlds and work together to overcome a powerful dark force that threatens both universes.
Obviously, Harry Potter himself is very likely to interact with the Beast King. He has a natural inclination towards helping those in need and has a great sense of justice. Hermione Granger would also be a great character to interact with the Beast King. With her vast knowledge of magic and books, she could offer valuable insights about the Beast King's powers and history.
Definitely Harry Potter and Optimus Prime. Harry is the hero in the wizarding world, and Optimus is the leader of the Autobots. They both have a strong sense of justice and would likely team up to face big threats. Another pair could be Hermione and Bumblebee. Hermione's intelligence could be used to understand the Transformers' technology, and Bumblebee's friendly nature would make them get along well.
Hermione Granger and Albedo could also be characters that interact. Hermione is known for her intelligence and thirst for knowledge. Albedo is extremely intelligent as well in matters of strategy and magic in the Overlord world. They could exchange knowledge about their respective magic systems, like Hermione explaining the theory behind Transfiguration to Albedo.
One interesting aspect could be the contrast in magic systems. In Harry Potter, magic is more about spells and potions, while Starscream has his own set of technological 'powers' in the Transformers universe. A crossover might explore how they interact. For example, how would Starscream react to a wizard's ability to apparate? And how would a wizard deal with Starscream's flight and weaponry capabilities.
Rebekah Mikaelson and Hermione would be likely to interact. Hermione is curious and intelligent, and she would be intrigued by Rebekah's different kind of magic. She would probably ask Rebekah a million questions about her vampire nature and the magic in her world. Rebekah, on the other hand, might be a bit annoyed at first but would come to respect Hermione's thirst for knowledge.
Probably Harry Potter and Edward Cullen. Since Edward is sort of the main character among the Cullens in a way, and Harry is the central figure in his world. They both have unique abilities and a sense of responsibility, so it makes sense for them to be the first to cross paths and start interacting.