Living with McGonagall, Harry would become more empathetic. He'd see her as a mother - like figure who has her own struggles and joys. This would make him more in tune with the feelings of others. His magical abilities would also develop in a more refined way. McGonagall could introduce him to some of the more complex and ancient spells, which would require him to be more patient and precise in his magic, thus shaping his character to be more focused and detail - oriented.
Her relationship with Harry would deepen. She'd be involved in his personal growth on a much deeper level. For instance, she could guide him on how to handle his fame in a more positive way. She'd also be there for him during his hormonal teenage years, giving him advice on relationships just like a normal family member would do.
His character would likely become more well - rounded. Since the Grangers are intellectuals, Harry might become more studious. He'd be exposed to different ways of thinking. For instance, instead of just relying on magic for solutions, he'd learn to use logic and knowledge like the Grangers do.
Harry's character would likely become more hardened. Living with Klaus, he'd be exposed to a much more cut - throat world. His sense of morality might be challenged as Klaus has a different set of values. He could become more self - reliant too, as Klaus wouldn't coddle him. For example, in the wizarding world, Harry had friends to rely on, but with Klaus, he'd have to learn to fend for himself in different ways.
Harry might become more conflicted. He'd be exposed to Grindelwald's ideas which could make him question the black - and - white view of good and evil he had before. His confidence could waver as he's no longer in the familiar Hogwarts environment.
Harry's character could become more confident. Knowing he has such a powerful ancestor like Gilgamesh might boost his self - esteem. He may also become more assertive in his actions and decisions.
At first, it would be really rocky. Harry would be suspicious of Snape and Snape would be his usual grumpy self. But over time, as they get to know each other better, they might start to respect each other. Harry could learn about Snape's past and his complex relationship with his mother, which might soften his view of Snape.
The relationship would be a rocky one. Snape has his past grudges against Harry's father. However, living together, they would be forced to interact daily. Harry might start to understand Snape's difficult past and Snape could see Harry's potential. There could be moments of anger, but also moments of mutual understanding, like when Harry helps Snape with some magical experiment.
His relationship with Draco could force him to be more empathetic. Instead of just seeing Draco as an enemy, he has to live with him daily. This could lead to Harry developing a more nuanced understanding of people, and his character could become more forgiving and less impulsive in his judgments.
Harry may become more outgoing. Living with the Weasleys, who are a very warm and sociable family, he is constantly surrounded by people. This could make him more comfortable in social situations compared to when he was living with the Dursleys. For instance, he might start initiating conversations more often and be more open about his feelings.
One possible plot could be that after some sort of danger at Hogwarts, perhaps a new dark threat, Dumbledore decides that Harry would be safer living with McGonagall. McGonagall, being strict but fair, would impose a strict study regime on Harry. She'd also teach him some advanced magic that he might not learn in regular classes. Harry would get to see a different side of her, like her love for cats which could lead to some comical moments as he tries to interact with her Animagus form.