Healing is also a major theme. The sister goes through a process of recovering from the psychological and physical wounds of abuse. This can involve making new friends, finding new interests, and learning to trust again, which is often explored in great detail in these fanfictions.
There's 'A Marauder's Sister's Struggle'. In this fanfiction, the sister endures a lot of abuse but with the help of her friends, she gradually stands up for herself. It has some really emotional scenes that draw you in.
They are likely to be horrified. James, for example, would probably be extremely angry that his friend had to endure such a thing. He might immediately vow to protect Sirius from any further harm. Remus, being more empathetic, would be there to comfort Sirius and offer his support in a more quiet and understanding way. Peter, though not as strong - willed as the others, would still be shocked and follow the lead of James and Remus in trying to make Sirius feel better.
One great 'Hermione is a Marauders sister' fanfiction is 'The Marauder's Sister'. It has an interesting plot where Hermione's new family dynamic with the Marauders really changes the course of the Harry Potter story. It's full of heartwarming moments and also some exciting action scenes.
One common reaction is shock. The Marauders, especially James Potter, might be shown as suddenly realizing the extent of the abuse Severus has endured. In some fanfictions, they could feel guilty for their past actions towards him, like their bullying. Another reaction could be anger towards the abusers. They may decide to take action to protect Severus from further harm, which could lead to a change in their relationship dynamics.
One common theme is friendship and loyalty. The Marauders' unwavering support for Sirius showcases the strength of their bond. Another theme could be healing. Sirius has to go through a process of emotional healing, and the fanfiction might explore how he does that with the help of his friends. Also, there might be a theme of justice, especially if the abuser is still around or if there are people who need to be held accountable for what happened to Sirius.
They would be shocked and angry. James might immediately want to confront Sirius' family. Remus would be empathetic and try to comfort Sirius. Peter, though a bit cowardly, would also show concern.
One possible plot development could be that they try to hide Sirius from his family. Another is that they report the abuse to the authorities at Hogwarts.
There could also be an antagonist, perhaps the abuser. This character would play a crucial role in driving the conflict in the story. They could be a complex character with their own motives, though their actions are clearly wrong.
Well, it changes the plot in many ways. For example, Hermione having a connection to the Marauders means she has access to a whole different set of knowledge and relationships. This could lead to different ways of dealing with Voldemort, like using some of the Marauders' old secrets or contacts.