One potential character could be a Métis witch who has a deep connection to both the Muggle and wizarding worlds in Canada. She could introduce Harry to the rich cultural heritage of the Métis people and how it intersects with magic. Another character could be a Canadian Quidditch star who takes Harry under his wing and teaches him the Canadian way of playing the sport.
Obviously, Harry Potter himself. Then there could be some Canadian - born witches and wizards as his friends. Maybe a tough - as - nails girl from the Yukon who is an expert at ice magic. And a laid - back boy from Vancouver who has a special talent for communicating with magical forest animals.
There could be an old Canadian wizard as a mentor figure. He could be like a cross between Dumbledore and a Canadian trapper. He would teach Harry about the unique magic of Canada. Also, there might be a group of young Canadian wizards who are rivals to Harry at first but later become his friends. They would have their own style of magic, perhaps using totems or something similar.
Obviously, Harry Potter himself. Then there could be a Texan version of Hagrid, like a big - hearted rancher who discovers Harry's magical abilities. There might also be a local witch or wizard who acts as a mentor, someone with a thick Texan accent. And don't forget about the muggles in Texas, Harry's classmates at a regular school before he goes to Hogwarts. They could be curious, tough - as - nails Texans who don't quite understand Harry's strange behavior at times.
Obviously, Harry himself. Then there could be German - born wizards and witches who become his friends or mentors. There might be a strict German potions master like Snape in Hogwarts. And perhaps a German - version of Dumbledore, an old and wise wizard who guides Harry.
In such a fanfiction, apart from Harry, there could be a gang of street urchins. One of them might be a girl who has a special connection with Harry. And then there are the professors at Hogwarts. Snape would probably have an even more difficult time with this street - raised Harry. He might see him as a troublemaker at first. And Dumbledore would be the one trying to guide Harry in this new, different situation, still seeing his potential.
Well, it could be really interesting. Maybe he'd grow up in a small Canadian town, going to a regular Canadian school but still having some strange magical things happen. For example, he might use his magic to play hockey in a super cool way, like making the puck fly faster than anyone can see. And he'd probably have a different accent and some Canadian slang in his speech.
Well, aside from Voldemort, there might be corrupt elements within the assassin organization that raised Harry. They could see his magic as a threat to their power and secrecy. Also, there could be some dark wizards who team up with the assassin enemies of Harry. These villains would be more complex as they combine the danger of dark magic with the stealth and combat skills of assassins. And there could be a new character, perhaps an assassin who was once a friend but turns bad due to jealousy or a thirst for power, creating a more personal and dangerous threat to Harry.
Voldemort would still be a major enemy. But with Kratos raising Harry, Voldemort might face a much more challenging opponent. Also, any dark wizards or creatures that oppose Harry would be in trouble. Kratos wouldn't tolerate any threats to Harry, so even the Death Eaters would have to be extra careful. Another potential enemy could be those in the wizarding world who oppose Kratos' methods of raising Harry, seeing them as too brutal or un - wizard - like.
Some of the Death Eaters who might have survived or changed their ways in an alternate universe could be the slashers. They would bring their knowledge of the Dark Arts and their own twisted view of the wizarding world. Bellatrix Lestrange, if she had a different path, could be a very interesting slasher figure in such a fanfiction, as she is extremely powerful and unpredictable.
Obviously, Harry and Charlus Potter are the main characters. Harry as the one being raised, and Charlus as the one doing the raising.
A new young teacher at Hogwarts. She could be a prodigy in Transfiguration, having mastered some really advanced spells at a young age. She brings a fresh perspective to teaching and has a bit of a rivalry with McGonagall in the fanfic. She might also have a mysterious past that is gradually revealed throughout the story.
Obviously, Madam Pomfrey is a key character as she runs the hospital wing. Harry, Ron, and Hermione could also be characters, perhaps they visit a friend who is ill. There could also be some minor characters like Neville who might get injured during a Herbology class and end up in the hospital wing.