Well, it would likely make Harry feel extremely alone and betrayed. He already lost his parents, and Sirius was like a father figure. This could harden Harry, make him more distrustful, and he might become more self - reliant, not relying on others as much for emotional support.
It could be a huge blow to Harry's self - esteem. He might start to question his own worth if Sirius, someone he trusted so much, disowns him. It could also lead to a more reckless Harry. Without Sirius's guidance, he may be more likely to take risks without thinking them through, thinking he has nothing left to lose.
At first, Harry would likely be confused and scared. But this experience could force him to become more independent. He can't rely on Dumbledore or his friends at Hogwarts immediately. He has to learn to trust his own instincts and the bond he has with Sirius. This might make him more cautious in the future when it comes to trusting adults. For example, he might question Dumbledore's motives more often.
Growing up with Remus would also expose Harry to a different side of the wizarding world. Remus has connections with various magical beings and outcasts. Harry would then be more open - minded about different magical cultures and species. He would not be as quick to judge based on what he has been taught at Hogwarts, but rather form his own opinions. This would shape him into a more well - rounded and worldly wizard compared to the Harry we know from the original series.
In this kind of fanfiction, this dynamic can be quite complex. On one hand, Harry could start to internalize the 'baby' treatment and act more immaturely. He might not take risks or stand up for himself as much. However, on the other hand, it could also be a form of protection for Harry. Sirius may be trying to shield him from the harsh realities of the wizarding world. This could lead to Harry having a more sheltered view of things at first, but as he matures, he could break free from this perception and become a stronger character.
Often, detention scenes in Harry Potter fanfiction provide opportunities for characters to show their true nature. If a character is normally seen as a troublemaker, during detention they might show a more caring side. For example, Draco might help a first - year student who is also in detention out of pity or a sense of fairness, which is a side of him that is not often shown in the regular storylines. This helps to flesh out the character and make them more complex and interesting.
Their talk could also enhance Harry's magical knowledge. Sirius could teach him spells or magical techniques that he hadn't learned at Hogwarts yet. This new knowledge would be very useful for Harry in his fight against the Dark Arts. Moreover, learning from Sirius would make Harry more independent in his magical growth as he gets advice from someone outside of the school environment.
Sirius would have a big impact on Harry's understanding of family. Harry has always longed for a real family, and Sirius would show him what a loving and supportive family can be like. This would make Harry more open - hearted and less guarded. He would also be more likely to forgive those who have wronged him in the past, as Sirius might teach him the value of forgiveness. Moreover, Sirius' love for adventure could make Harry more adventurous in his exploration of magic and the wizarding world.
Sirius' character development could involve him coming to terms with his own past traumas while rescuing Harry. He may have to face his fear of Azkaban and the dark magic that he has encountered in his life. As he rescues Harry time and time again, he becomes more confident in his own abilities and his place in the fight against Voldemort. He also starts to see Harry as more than just James' son, but as an important part of the wizarding world's future, which makes him more committed to protecting Harry at all costs.
The abuse can also make him more empathetic. Harry has known pain, and in this situation, he could use that pain to better understand others who are suffering. This could lead to him becoming a champion for the underdog in the wizarding world, using his experiences to fight against all forms of injustice.
Well, it likely makes him more independent. He has to rely on himself more without parental support. He might grow up quicker, learning to fend for himself and make his own decisions earlier than he would have with loving parents.
If Harry is taller in fanfiction, it could make him seem more confident. People often associate height with leadership, so he might take on more of a leadership role among his peers.