Another potential character could be a young Hebrew - speaking student who transfers to Hogwarts. This student could have a deep knowledge of Hebrew magic and become Harry's partner in exploring the secrets of Hebrew - related magic. And of course, Dumbledore might have some knowledge of Hebrew magic in the background and offer some cryptic advice to Harry from time to time.
In addition to Harry, Ron could play a role. He might be initially skeptical about Harry's foray into Hebrew magic but later comes around. There could also be a wise old Hebrew - speaking rabbi - like figure who serves as a mentor to Harry, guiding him through the complex world of Hebrew spells and their meanings.
Perhaps Harry is transported to a parallel magical world where Hebrew is the main language of magic. He has to quickly learn to speak Hebrew in order to communicate and find his way back to his own world. Along the way, he meets new friends who teach him about the unique aspects of Hebrew magic.
Obviously, Percy Jackson himself. Annabeth could also be there, as she is smart and would be interested in Percy's new - found fluency in Greek. Grover might tag along, adding his own unique perspective. And of course, Chiron, who has a deep knowledge of Greek culture and language, could play an important role.
Obviously, Harry Potter himself. There would also likely be Viktor Krum, who is from Durmstrang. Krum could be either a friend or a rival to Harry. Igor Karkaroff, the headmaster of Durmstrang, would be another important character. And there could be new students created for the fanfic, like a Durmstrang student who becomes Harry's guide in the new school.
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.
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.
Obviously, Harry Potter himself. There could also be Japanese wizard characters who are his opponents in the dueling tournament. Maybe Hermione and Ron could come along with Harry, or they could be back at Hogwarts while Harry is in Japan, but still communicate with him. There might also be some Japanese magical teachers or judges in the tournament.
Obviously, Harry Potter himself. There could also be some Beautox - natives, like a wizard or witch who is an expert in Beautox magic. Maybe Hermione would somehow find a way to follow Harry and she'd be there too, trying to figure out the new magic system.
Some potential characters could include Fleur Delacour. She's beautiful and has her own brand of magic. Cho Chang could also be part of it. And what about a new character, a mysterious witch from a hidden wizarding village? She could bring in new elements to the harem, like a different type of magic or a unique personality trait.
Obviously, Harry Potter himself is a central character. His wife, whether it's Ginny or in some alternate scenarios someone else, would also be very important. Then there are his friends like Ron and Hermione. They would likely be the baby's godparents or play important roles in the baby's life. Dumbledore, even though he's passed away, might still have an influence through his wisdom left behind. And of course, there could be new characters created specifically for the fanfic, such as a nanny or a tutor for the baby with some unique magical skills.