In the 'Harry Potter grows up in Wool's Orphanage fanfic', it could be really interesting if Harry's time in the orphanage shapes his personality in a different way compared to the original series. For example, he might become more street - smart and self - reliant. He could develop a unique way of using magic that is influenced by his difficult upbringing at the orphanage. This could make his interactions with the wizarding world later on more complex and full of surprises. His different perspective might also lead to him making different choices when it comes to dealing with the likes of Voldemort and his followers.
There could be the caretaker of the orphanage. This person might be a strict or kind figure who has a significant influence on Harry's early life. They could be either a source of support or a constant obstacle for Harry.
One interesting plotline could be the discovery of a hidden magical artifact within the orphanage. Maybe it has some connection to Harry Potter's past or his future adventures. Another could be the relationships between the orphans and how they interact with the wizarding world that starts to seep into their lives.
In some fanfictions, Harry might form a very close bond with another orphan who has latent magical abilities. They could explore the world of magic together in secret, long before he gets his Hogwarts letter. For example, they might find a hidden passage in the orphanage that leads to a small magical realm where they practice basic spells.
Often, Harry Potter himself is a main character. There might also be other orphans in the Wool's Orphanage who play important roles. Maybe there's a smart and curious orphan who becomes Harry's sidekick in uncovering the secrets of the orphanage.
One difference could be his personality. Growing up in an orphanage might make him more independent and self - reliant from a young age. He would have to fend for himself more without the Dursleys' influence, which could also make him more distrustful of adults initially.
One idea could be that the orphanage is a hidden place for magical orphans with special powers. The orphans form a secret society within the orphanage to protect themselves from dark wizards who want to use their powers. They learn magic on their own, using old books they find in the attic of the orphanage.
One interesting plot development can be that Harry levels up his Occlumency skills to an extraordinary level. This would mean he can not only block Voldemort from invading his mind but also be able to read the minds of others to some extent. This would give him a huge advantage in battles and in uncovering mysteries. For instance, he could use this skill to figure out the true intentions of some of the more ambiguous characters in the wizarding world, like Snape. And it would completely change the dynamics of his relationship with other characters, as they would be more cautious around him knowing he can peek into their thoughts.
One possible plot could be that Harry discovers his vampire heritage early on. Maybe his parents were involved with vampires in some way. As he grows, he has to hide his vampire tendencies from his Hogwarts friends while also learning to control his new powers, like super strength and enhanced senses. He might struggle with the urge to drink blood and have to find a substitute in the wizarding world.
The fanfic might explore how Harry's upbringing in the wizarding world affects his mental state as he ages. He could struggle with the pressure of being 'the boy who lived' and having so many expectations placed on him. For example, he might have anxiety about always having to be the hero. Also, his relationships with friends like Ron and Hermione could change as he matures and they all face different challenges in life. This could all be part of the psychological growth aspect of the fanfic.
One interesting plot could be how Harry, now as a girl, has to deal with the different social dynamics in Hogwarts. For example, she might face different expectations from teachers and peers. Maybe she forms new friendships with female characters in a way that Harry as a boy never did before.