The interactions could also be based on mutual needs. The Harry Potter characters might need protection in the new and dangerous world of Night Raid, and Night Raid could use the magic of the Harry Potter characters to gain an edge in their battles. For instance, Ron could use his chess - playing skills to help plan attacks, which Night Raid would find very useful. And in return, Night Raid could offer their knowledge of the local terrain and the habits of their enemies to the Harry Potter characters.
There could be a lot of cultural clashes and misunderstandings at first. The Night Raid characters are used to a world of political intrigue and assassination, while the Harry Potter characters come from a world of wizards and magic schools. However, they could find common ground in their fight against injustice. Akame from Night Raid might be impressed by Hermione's intelligence and determination, and Hermione could be in awe of Akame's combat skills. They could then work together to plan strategies against their enemies.
A plot could involve the transfer of some magical items from the Harry Potter universe to the Night Raid setting. The members of Night Raid might be initially confused by these strange objects but then figure out how to use them in their fight. For instance, the invisibility cloak could be used for stealth missions by Night Raid members, and they could teach Harry Potter some of their assassination techniques in return.
Hermione Granger is a very common character. Since she is Harry's best friend, she would likely be there to help him understand and control his new superpowers. She might research in the library to find out how these powers came about and how to use them effectively. Ron Weasley is also common. He would probably be both in awe and a bit jealous of Harry's new powers at first but would still support him in the end.
They might interact as allies. For instance, Itachi's combat skills and strategic mind could help Harry in battles against Voldemort's forces. Harry, in turn, could introduce Itachi to the magic of the wizarding world, like spells that could enhance Itachi's abilities further.
Harry would likely be very suspicious of The Joker from the start. He's used to dealing with threats in his own world, and The Joker's erratic behavior would set off alarm bells. Hermione would probably try to study The Joker, looking for a logical explanation for his actions and a way to counter him. Ron, on the other hand, might be a bit more fearful at first but would still stand by his friends. They would initially approach The Joker with caution, trying to figure out if he has any magical abilities or if he's just a very strange Muggle who has found his way into their world.
She might interact with Hermione in a way that challenges Hermione's logical view of relationships. Aphrodite could introduce her to a more emotional and instinctive side of love. They could have conversations about how love is not always something that can be explained by books or logic, and this could lead to Hermione having a different perspective on her own feelings for Ron or other potential partners.
They could interact through a magical portal that connects their two worlds. For instance, Supergirl could be curious about the magic in Harry's world and visit Hogwarts. She might use her superpowers to help in a Quidditch match, like flying really fast to catch the Golden Snitch before any of the players. Harry, on the other hand, could visit Metropolis with Supergirl and be amazed by the tall buildings and advanced technology.
Hermione would be very interested in studying Rapunzel's hair magic. She would want to research if it could be related to any known magic in the wizarding world. Rapunzel would be eager to learn from Hermione's vast knowledge of spells and potions. Ron might be a bit skeptical at first, but as he sees the practical uses of Rapunzel's hair, like using it to rescue someone from a high place, he would start to accept her and her magic. And together, they could face challenges like fighting off dark creatures or solving magical mysteries.
Sansa, with her refined manners, would initially seem a bit out of place among the more casual Hogwarts students. However, Harry would see past that and recognize her strength. They could interact in a way that Sansa teaches Harry about diplomacy and strategy from her own experiences in Westeros. Harry, on the other hand, could introduce Sansa to the concept of magic as a tool for good. Their interactions would also be shaped by their shared experiences of facing difficult situations and having to make tough decisions. They might even compare notes on how to deal with enemies like the Death Eaters and the Lannisters.
Harry might be initially cautious about the Triforce. He's used to his wand and magic, so this new, unknown power would be a bit intimidating. But his sense of right and wrong would lead him to explore its potential for good. He would likely try to use it to protect his friends and defeat Voldemort.
One way for them to interact is if a wizard from the Harry Potter world has a special interest in the magic of Mowgli's jungle. This wizard could send Harry on an expedition there. When Harry arrives, Mowgli sees him as a strange intruder at first. But as Harry shows his good intentions, they start to work together. Mowgli could introduce Harry to the different parts of the jungle, and Harry could share stories of his adventures at Hogwarts. As they spend more time together, they realize that they can help each other. For instance, Mowgli's animal friends could help Harry find a rare magical plant in the jungle, and Harry could use magic to protect the jungle from a group of poachers who are after some of the magical animals.