At first, Draco might be hesitant and a bit out of his depth. But as he spends more time with Harry, he grows. He becomes more selfless. He has to learn how to be a father - figure, which means sacrificing his own wants sometimes. He also develops a stronger sense of justice as he protects Harry from those who might want to harm him because of his status as 'the boy who lived'. This is a big change from his earlier, more self - centered character in the original series.
Draco becomes more empathetic. Adopting Harry makes him look beyond his old pure - blood supremacist views. He starts to understand the struggles Harry has faced.
In the fanfiction, their relationship would be complex at the start. Snape, having his own demons and secrets, would be a bit of an enigma to Draco. Draco, on the other hand, would be dealing with the loss of his family's status. Snape would start by providing a stable home for Draco. As they interact more, Draco would notice Snape's small acts of kindness. Snape would encourage Draco to explore his own identity outside of the Malfoy name. This would lead to a closer relationship, with Snape teaching Draco about things like loyalty, sacrifice, and the true nature of magic, and Draco in turn bringing out a more human side of Snape.
He could also develop a better understanding of the 'light side'. Taking care of Harry, who represents so much of what the 'light side' stands for, even in his deaged state, makes Draco question his own alignment with the 'dark side'. This internal struggle can lead to significant character growth.
Draco starts to become more empathetic. Usually seen as a bit of a cold character, taking care of Harry forces him to understand the feelings of others on a deeper level.
At first, it's likely to be full of hostility. Draco would probably enjoy lording over Harry as his slave, and Harry would resent it. But as the story progresses, they might start to understand each other better. For instance, Draco could see Harry's strength and determination even in his slave position.
In these fanfictions, Draco's character development can be quite diverse. He could initially be resistant to his new family, but as he gets to know them better, he begins to soften. His experiences with his new family might expose him to different magical cultures or ideas that he never considered before. This could lead to him becoming more open - minded and less arrogant. He may also develop new skills or talents under the guidance of his new family members.
Draco's character often develops by becoming more open - minded. In the Muggle world, he's forced to confront ideas and ways of life that are completely different from what he knew in the wizarding world. This can make him more empathetic towards others. For example, if he meets a Muggle who is struggling financially but still has a positive attitude, it might make him re - evaluate his own values.
Draco's character development in this fanfiction is likely to be significant. Living with the Weasleys, he's exposed to a whole new set of values. He starts to see that blood purity isn't everything, as the Weasleys value people for who they are. This makes him question his own upbringing. He may become more empathetic towards those he previously looked down upon. For example, he could start to understand the struggles of Muggle - borns like Hermione. His arrogance may gradually fade as he experiences the warmth and acceptance of the Weasley family, which is very different from the cold environment of Malfoy Manor.
Draco's development could be about him learning to trust again. Maybe he has been let down by his family or friends before, but the puppy is always there for him. Through their play and interactions, he starts to trust the puppy completely. This trust could then lead him to be more trusting of others in general. He might also start to question some of the more cruel aspects of the Slytherin values he has been taught as he compares them to the innocent and loving nature of the puppy.
They would probably become like brothers. With Snape as their common father figure, they would have to learn to get along. Harry might be more forgiving of Draco's past actions, and Draco would have to let go of his animosity towards Harry.
At first, they might be shocked and a bit confused about being twins. But as time goes on, they start to trust each other more. They could share their secrets and fears, like Harry might tell Draco about his nightmares of Voldemort, and Draco might open up about the pressure from his family.