In fanfiction where Harry Potter has a long lost sister, how would her character be different from Harry's?

Well, she would be much more hardened. The original Harry grew up in a relatively normal, albeit unloving, muggle household. But a female Harry in Arkham would have seen and experienced true horror and madness from a young age. So she'd be more cynical and less trusting.

She would likely have a different view of family. Growing up with the Delacours, she would have a more flamboyant and loving family environment. This would make her more confident in showing affection and relying on family support. In contrast, the original Harry had a rather lonely childhood until he discovered the wizarding world. Her relationships with others would also be different. She might be more diplomatic, having learned from the Delacour family's social skills, which could lead to different interactions with characters like Snape or Dumbledore.

She would be much more aggressive. While Harry was brave and sometimes impulsive, her aggression would come from her Ares heritage. She might be quicker to use force rather than diplomacy or cleverness like Harry often did.

Well, her experience at Hogwarts could be quite different in many ways. Since Harry had faced so many challenges and life - threatening situations during his time at Hogwarts, the school would have tightened security in some ways. So she might find it a bit more restricted in some areas. But at the same time, because of her father's influence, she could have access to some special privileges. For example, she might be allowed to visit the Forbidden Forest more often for research purposes if she shows an interest in magical creatures. Also, her social life would be different. Harry had a rather small group of very close friends, but she could be more of a social butterfly, flitting between different groups in different houses. This would give her a broader perspective on the different cultures within Hogwarts. And in terms of her academic performance, she might be under more pressure to excel not just for herself but also to uphold her father's name. But she could also use her father's knowledge and experiences as a source of inspiration and guidance to do well in her studies.

She could be different in terms of personality. Harry is often seen as somewhat reserved and brooding at times. His twin sister might be more outgoing and cheerful, always able to see the bright side of things even in the darkest of times. This difference in attitude could lead to her being the one who cheers up Harry when he's feeling down.

The sister's character could be developed as a strong - willed individual. For example, if she was raised in a difficult situation, like in an orphanage in the Muggle world, she could have a tough exterior but a kind heart. She might be initially distrustful of the wizarding world when she discovers it, but as she learns more about her family and the fight against Voldemort, she becomes more open - minded and determined to help.

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, for starters, her moral compass would likely be more complex. The original Harry had a strong sense of right and wrong based on the values of the wizarding world. But a female Harry raised by demons might question those values more. She might be more cynical at first. For example, she may not see things like stealing magic items as completely wrong if she was taught by demons that survival is the most important thing.

He would be more refined. Royal upbringing would instill in him a sense of propriety and elegance that he lacks in the original story.

Maybe Harry's son is more outgoing and socially confident. Harry had his own circle of friends but was often a bit of a loner at first. His son, on the other hand, could be the life of the party at Hogwarts, making friends across all houses and different magical species. He might use his social skills to bring about positive change in the wizarding world, like organizing inter - house unity events. He could also be more open - minded about new forms of magic that are emerging, not being as tied to the traditional ways as Harry was initially.