Obviously, Harry would be the main character. But he could meet new friends like an Aboriginal wizard who teaches him about the ancient magic of the land. There might also be a young Australian witch who becomes his love interest and helps him adapt to the Australian wizarding world.
In addition to Harry, there could be a reclusive old wizard living in the Australian bush who becomes Harry's mentor. And of course, there could be some not - so - friendly Australian magical beings that Harry has to deal with, like a mischievous bunyip that keeps causing trouble in his new neighborhood.
One possible plot could be that Harry, tired of his fame in his home country, decides to move to Australia for anonymity. He enrolls in an Australian wizarding school as a transfer student. There, he experiences a different style of magic education, participates in local wizarding sports, and falls in love with an Australian witch while trying to keep his true identity a secret.
Hermione could be one. She might follow Harry to Australia to continue their adventures together. She could be interested in studying the different magical plants in Australia and how they can be used in potions.
There could be new characters introduced in this fanfiction. For example, a local wizard in the place where Harry moves to could become a main character. This wizard could initially be suspicious of Harry but later become his friend. Also, a magical creature that Harry befriends in his new location could be a central figure. It could help Harry adapt to his new surroundings and teach him things about the local magic that he didn't know before.
In such a fanfiction, they might face new magical creatures unique to Australia. For example, the Drop - bear, which could be a fun and dangerous encounter for the Potter family. They may also have to adapt to a different magical community with its own set of rules and traditions.
Sometimes, even antagonists from Hermione's past in the UK might make an appearance in the story. Maybe a Death Eater who escaped justice and is now also hiding in Australia. This would create a tense situation where Hermione has to deal with this old threat while also trying to build a new life in a foreign magical land.
Elena could be one of the main characters. She is a central figure in Mystic Falls and would likely cross paths with Harry.
Stiles. Stiles is Scott's best friend and he's very intelligent. He could be the one who initially is suspicious of Harry but then realizes his value. Harry and Stiles might bond over their shared problem - solving skills, though in different ways. Harry with his magic and Stiles with his deductive reasoning.
Obviously, Harry would be one of the main characters. But there could also be new characters that the author creates for the story. Maybe there's a wise old wizard who takes Harry under his wing in the new place he moves to.
In this fanfiction, Hermione would be greatly influenced. She would be eager to explore the Australian magical libraries and discover new spells and potions. Ron might gain a love for Australian food, which could change his physique a bit. The kids would be more open - minded, as they are exposed to a new and diverse magical culture. They might also become more independent, as the Australian wizarding community could have a different parenting style.
Obviously, Harry Potter would be one of the main characters. And then there could be characters from Twilight like Bella Swan and Edward Cullen. Hermione and Ron might also show up to visit Harry in Forks, adding more wizarding elements to the story.