Their relationship would deepen significantly. McGonagall would have more opportunities to mentor Harry on a one - on - one basis. She could share her wisdom about life, magic, and the wizarding world in a more intimate setting. Harry, in turn, would likely develop a stronger sense of respect and admiration for her as he sees how she lives her life outside of Hogwarts' halls.
It would become much more personal. Instead of just a student - teacher relationship, they would be like family. Harry would see a different side of McGonagall, a more relaxed and domestic side perhaps.
His daily routine would change a great deal. Instead of waking up to the cold and often dreary UK weather, he'd wake up to the warm sun of Hawaii. He might start his days with a swim in the ocean rather than a walk around the Hogwarts grounds.
Well, perhaps Harry moves in with McGonagall because Hogwarts has been damaged and he has no other place to go. McGonagall could then take on a more motherly role, teaching Harry advanced magic and helping him deal with his PTSD from all the battles.
She becomes more nurturing. Usually, she's known for her strictness at Hogwarts, but when she adopts Harry, she softens up. For instance, she might show more patience when Harry makes mistakes in his magic studies.
Hermione's status at Hogwarts might change. She could have more privileges or face different expectations. For example, McGonagall might be more protective of her, which could lead to different interactions with other students and teachers.
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.
It completely flips their relationship. In the original story, McGonagall is a respected figure for Harry. But in this fanfiction, the hatred makes their interactions tense and negative.
McGonagall might notice Harry's distrust and feel hurt or frustrated. She may try to figure out what went wrong but find it difficult as Harry is not forthcoming. Their interactions become less warm and more formal. For example, in class, Harry may be less likely to ask for help from McGonagall, and McGonagall may be more strict with Harry as she doesn't understand his change in attitude.
The discipline would probably change a great deal. McGonagall was known for her strict but fair discipline. Without her, students might start getting away with more mischief. Also, the Gryffindor house would lose its strong guiding figure. The new teacher in charge might not have the same understanding of the Gryffindor values. Academically, her expertise in Transfiguration would be missed. There might be a decline in the quality of Transfiguration teaching.
Well, it could change a great deal. For one, Hermione might have more access to inside knowledge about Hogwarts. McGonagall could be more protective of her, which might lead to different situations where Hermione is involved. For example, in dangerous situations, McGonagall might be more likely to step in directly to protect Hermione, rather than just as a teacher protecting a student.
It would be very strained at first. The Malfoys would see Harry as an intruder and a symbol of what they oppose. But as time goes on, they might start to see his good qualities. Harry, for his part, would always be on guard but might also feel a bit of pity for them as he learns more about their insecurities.