He might become more confident in his pure - blood heritage. Since Dorea Black is from an old pure - blood family, she could instill in Harry a sense of pride and belonging that he didn't have in the original story. This could change his attitude towards other pure - bloods and half - bloods.
One interesting plot could be how Dorea Black's different values and family traditions shape Harry's upbringing. Maybe she instills in him a stronger sense of pure - blood pride in a more positive way compared to the negative connotations in the original series. Another plot might involve how Harry's relationships with other characters, like Ron and Hermione, develop differently under Dorea's influence.
One possible plot twist could be that Dorea Black, being from a pure - blood family, tries to shield Fem Harry from the growing dark forces in a different way than the Dursleys did in the original story. Maybe she uses her family's old magic and connections to give Fem Harry a more magical - centered upbringing, which leads to Fem Harry having a different set of skills and knowledge earlier on.
Harry's magic could be stronger. Dorea's influence and knowledge of magic could have allowed Harry to tap into his magic potential more easily. Maybe he would be able to perform advanced spells earlier. Also, his magic might have a different 'flavor' so to speak. Since Dorea comes from a different magical background than the Dursleys, Harry's magic could be more attuned to the traditional wizarding ways of magic use.
There's a fanfic titled 'Dorea Black: A Forgotten Legacy'. In this, Dorea is portrayed as a strong - willed witch who tries to break free from the shackles of the Black family's expectations. It explores her friendships outside the family and how she might have secretly opposed some of the family's more extreme views on blood purity.
One possible plot twist could be that Dorea Black, being a pure - blooded Black, tries to instill in Harry a strong sense of pure - blood pride in a different way than the Malfoys. Instead of the usual haughty and discriminatory way, she teaches him about the history and magic of their bloodline in a more positive light. This could lead to Harry having a different perspective on the wizarding world's social hierarchy.
Harry might be more confident in his pure - blood heritage. Since Dorea Black would likely educate him about it, he wouldn't feel as out of place among the pure - blood families as he did in the original story. He may carry himself with more pride, but not in an arrogant way.
Well, it could involve Dorea teaching Harry about the wizarding world in a more traditional Pure - blood way. Maybe she'd introduce him to old family magic that the Blacks possess.
Her character might be more confident earlier on. Since Dorea Black is from a magical family, Fem Harry would likely be exposed to magic and magical culture from a very young age. She wouldn't have the same feelings of being an outcast that the original Harry had at the Dursleys. This could lead to her being more self - assured when she arrives at Hogwarts.
Well, if Harry Potter was raised by Dorea, his character would likely be more refined. Dorea might instill in him a sense of pure - blood pride in a positive way, not the arrogant kind. He would probably grow up with a different set of values compared to being raised by the Dursleys. His magical abilities could be honed earlier and more effectively as Dorea would have a better understanding of magic. Also, his social skills within the wizarding world might be enhanced from a young age, as Dorea would introduce him to the right circles.