The main characters in 'Harry Potter raised by Winchesters' fanfiction would have some interesting interactions. Harry would surely have a lot of interaction with the Winchesters' enemies as well. Demons and other supernatural beings that the Winchesters fight would see Harry as a new target or a strange addition to the mix. In the wizarding world, Harry might interact with Snape in a more confrontational way, as his upbringing by the Winchesters could make him less patient with Snape's attitude. Also, new characters from the cross - over of the two universes could be created, and Harry would be at the center of those interactions.
Sam and Dean Winchester would interact with Harry like a big brother - type relationship. They would be protective of him, and teach him things. For example, Dean might show Harry how to use a gun while Sam could help him with research, both magical and non - magical. Harry would likely share his knowledge of magic with them, which would be fascinating for the Winchesters. He could also introduce them to his friends from Hogwarts like Hermione and Ron, and there would be some interesting cultural clashes between the hunter and wizarding cultures.
The main characters would surely include Harry Potter. He is the central figure in the Harry Potter series, and the story is about him being saved. The Winchesters, Sam and Dean, are also key. They bring their own set of skills and personalities from their own show. In addition, characters like Dumbledore might also play a role. He is the wise leader in the wizarding world and could either be aware of the Winchesters' presence or be clueless and later be impressed by their abilities to save Harry.
Well, Harry Potter is the central figure, but the Weasley siblings are key too. Fred and George could be like his fun - loving older brothers, teaching him all kinds of mischievous spells and pranks. Ginny would be like a sister, and their relationship could develop in a really interesting way. And Percy, despite his differences from the rest of the family, would also be an important character as Harry would be part of the family dynamic that Percy is also a part of.
Definitely Sam and Dean Winchester. They would be like his surrogate brothers or mentors. Then there's Castiel, the angel. He could have some interesting interactions with Harry, perhaps being intrigued by his magic. Bobby Singer could also be there, guiding Harry in the ways of hunting.
Obviously Gibbs himself would be a main character interacting with Harry. He'd be like a father figure.
Snape would have a very different relationship with Harry in this scenario. Instead of being a constant source of disdain, he might see Harry as an opportunity to shape a Slytherin in a new way. Pansy Parkinson could also be involved. She might initially be against Harry being in Slytherin but later come to accept him, or they could be in a constant battle of wits.
Well, depending on what 'rq' stands for, it could be a group of original characters created for the fanfiction. Maybe there's a wise old wizard who takes Harry under his wing as part of this 'rq' upbringing.
I think Harry Potter would definitely cross paths with Tyrion Lannister. Tyrion is known for his intelligence and wit, and Harry's unique perspective from the wizarding world could lead to some great conversations and schemes between them. Harry could also use his magic to help Tyrion in his political struggles within Westeros.
Obviously, Harry would interact a great deal with Newt. But also, they might run into other characters like Hagrid. Hagrid, being the Keeper of Keys and Grounds at Hogwarts and having a great love for magical creatures, would be interested in what Newt and Harry are up to. They could also meet some of Newt's old friends from his adventures in the Fantastic Beasts series.
Obviously, Harry Potter and the Mad Hatter. But there could also be other characters from the Harry Potter universe making appearances. Maybe Dumbledore would come to check on Harry and be completely bewildered by the Mad Hatter's ways. And of course, there could be some of the Wonderland characters popping up too, like the March Hare or the Cheshire Cat, adding more chaos to Harry's life.