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 would likely experience a significant transformation. Growing up with Grindelwald, he would be surrounded by a different set of values and magic. He might initially seem more aloof and calculating, having been taught by Grindelwald's methods. However, deep down, his inherent goodness might still be there. As he learns more about Grindelwald's true nature and plans, he would start to struggle. This struggle could lead to him becoming a more independent thinker. He might develop a new sense of justice that is a blend of what he learned from Hogwarts and his experiences with Grindelwald. His relationships with other characters would also be affected. He might be shunned by some of his old friends from Hogwarts, but at the same time, he could make new allies who see the potential for good in him despite his upbringing.
His character could develop in a very complex way. At first, Harry might be influenced by Grindelwald's charisma and power. He could become more withdrawn from the traditional values he held. But as he grows, he might start to resist. Maybe he'd use some of the knowledge Grindelwald gave him, but for good. For example, he could learn advanced defensive magic from Grindelwald and then use it to protect those who are being oppressed by Grindelwald's followers.
At first, it might be a relationship based on Grindelwald's self - serving motives. He sees Harry as a tool. But as they spend time together, there could be moments of mutual understanding. Harry might start to see Grindelwald not just as a villain but as someone with complex ideas.
He could develop a more cunning side. Bellatrix is a sly character, and Harry would need to learn to be crafty to survive in her world. This would be a big change from his usually straightforward and brave self. For example, he might learn how to deceive Death Eaters or other threats.
His character would likely become more conflicted. Harry was always a symbol of good in the original series, but under Grindelwald's influence, he'd be exposed to different ideas of power and control. He might start to question his own beliefs.
Harry's character would likely become more conflicted. He'd be exposed to Grindelwald's radical ideas, which might make him question the values he learned at Hogwarts. His sense of right and wrong could be blurred, and he'd have to struggle to hold onto his true self.
She might start off as a bit of an outcast. With her family name, she would be shunned by some. But as she experiences kindness from others, she could start to become more confident and less ashamed of her heritage. For example, if she meets a kind teacher at Hogwarts who encourages her to be her own person.
Harry might start off as a bit naive about the darker aspects of magic. But as he is trained by Grindelwald, he becomes more aware of the grey areas in the wizarding world. His character could become more conflicted as he is exposed to Grindelwald's teachings. He may question his previous beliefs and values.
At first, their relationship might be one of student - teacher, with Harry being curious and Grindelwald being manipulative. Harry would be eager to learn from Grindelwald's vast knowledge, but gradually he would start to sense that something is not right.
She would likely start off very influenced by Grindelwald. Maybe she'd be a bit cold and calculating like him at first. But as she experiences more of the world, she'd become more empathetic. For instance, if she meets a group of oppressed wizards, she'd start to question Grindelwald's views.
In a 'Grindelwald Adopts Harry' fanfic, Grindelwald could be seeking to create an heir of sorts. He adopts Harry when he is very young. Grindelwald might expose Harry to a world of magic that is different from what he would have known at Hogwarts. Harry could be taught magic that is more about power and control. However, as Harry gets older, he might discover the truth about Grindelwald's dark deeds and his plans for the wizarding world. This could lead to a great internal struggle within Harry as he has to choose between the man who raised him and what he believes is right for the wizarding community as a whole. There could be a lot of drama as Harry tries to find his place and figure out his true identity in this new and rather dark scenario.
Harry could also develop a more self - reliant and perhaps a bit of a loner personality. Since Grindelwald is not as nurturing as some other potential guardians, Harry would have to fend for himself more often. This would make him stronger in some ways but also more aloof from others, as he would be used to relying on his own skills and judgment rather than on a community or friends.