Snape's reaction could be multi - faceted. He might be angry at those who are abusing Draco, but also a bit conflicted because of Draco's family's ties to the Dark side. He could use his position as a teacher to give Draco some extra guidance and support, perhaps in the form of private tutoring sessions where he can also check on Draco's well - being more closely. He may also start to question his own views on the Malfoy family in general.
Snape's reaction could be quite mixed. On one hand, he might be angry at Dumbledore for not doing more if he knew about the abuse. He may also feel a strange sort of empathy towards Harry. After all, Snape himself had a difficult childhood. So, he could start to be a bit more lenient with Harry in his classes and try to subtly offer support.
Draco's reaction could be complex. He has been brought up in a certain environment where showing weakness is not acceptable. But when he discovers Harry is abused, he may find it difficult to ignore. He might start by being a bit standoffish as he processes this new information. However, deep down, he might feel a growing empathy for Harry. His actions could range from small gestures of kindness, like leaving a potion that could help heal Harry's wounds secretly, to gradually becoming more open about his concern and trying to get Harry away from the source of abuse. This discovery could be a turning point in their relationship, leading to a deeper understanding and connection between them.
The story could develop with Snape trying to subtly change Draco's behavior. For example, he might encourage Draco to make different friends or engage in more positive activities at Hogwarts. This could lead to Draco slowly breaking away from his family's dark influence. Or, Snape could use his influence in the Death Eaters (if he still has any at that point) to put pressure on the abuser to stop. It might also involve Draco opening up to Snape about his feelings and fears, leading to a deeper bond between them.
In many fanfics, Draco's reaction turns into a sense of protectiveness. He feels a need to shield Harry from any further harm, whether it's from the people who abused him in the past or from the judgment of others. For example, in some stories, he'll stand up to those who make snide remarks about Harry's past, using his Slytherin cunning to put them in their place. He also tries to be a source of comfort for Harry, which is a big change from their initially antagonistic relationship.
He might be shocked at first. Draco, despite his past rivalries, could feel a sense of protectiveness. He might initially struggle with his own beliefs and prejudices but then decides to help Hermione in secret. He could use his family's resources to make sure she is safe from further harm.
The discovery of the abuse would likely turn their relationship upside down. Draco may go from being indifferent or even mean to Hermione to being her secret defender. This could lead to a lot of internal conflict for him as he has to reconcile his new - found feelings of protectiveness with his old grudges. Over time, their relationship could evolve into a strange sort of partnership where they rely on each other in ways they never expected.
In the fanfiction, the abuser might be ostracized by the society. People would start to question his motives and actions. His influence in the wizarding world, whether it's in business or politics, would decline rapidly. The abuser might also have to face the wrath of some of the more powerful and just characters in the story. They could use their influence to make sure the abuser is held accountable for his actions.
One popular fanfiction with this plot is 'The Unseen Bond'. In it, Draco's discovery of Harry's abuse leads to a complex relationship development. Another is 'Hidden Scars', where Draco becomes Harry's unexpected protector. There's also 'A New Alliance' which focuses on how the wizarding community reacts to Draco's new - found knowledge about Harry's situation.
In the fanfic, Snape's reaction could be multi - faceted. He might start by investigating the abuse more deeply. He could use his skills as a Potions master and a former Death Eater to find out who is behind the abuse. And then, he might take steps to ensure Harry's safety. This could involve enlisting the help of other teachers or even trying to get Dumbledore more involved. He may also start to teach Harry some extra skills or give him potions to help him deal with the emotional and physical trauma of the abuse.