One possible motive could be that Narcissa has some sort of misunderstanding. Maybe she thinks Hermione is a threat to her family or has some crucial information related to the wizarding world that she wants to extract. Another reason might be related to the power struggle within the wizarding community. She might be using Hermione as a pawn in a larger game that involves different factions.
Perhaps Narcissa is acting out of desperation. There could be a situation where she believes Hermione holds the key to saving someone she loves, like her son Draco. By restraining Hermione to the bed, she can ensure that she has the upper hand in getting what she wants from Hermione. It could also be due to some long - held grudges or secrets in the wizarding world that involve Hermione, even if Hermione is not fully aware of them herself.
It's possible that Narcissa is being controlled or influenced by some dark magic or a more powerful wizard. She might not be entirely in her right mind when she restrains Hermione. In the complex world of fanfiction, there could be an external force compelling her to do this, and Hermione just happens to be in the wrong place at the wrong time. This could lead to a series of events where Hermione has to find a way to break free and uncover the truth behind Narcissa's actions.
One reason could be that Narcissa misinterpreted Hermione as a threat to her family or something she holds dear. So she pushed her on the bed as a quick way to immobilize her.
One possible motive could be to use Sakura as a bargaining chip. If he has some sort of plan against Naruto or the Hidden Leaf Village, Sakura, being a close comrade of Naruto, could be very useful. He might think that by restraining her, he can force Naruto to come to a certain location or make concessions.
Well, it could be many things. Maybe Hermione was shocked at first. Then, Narcissa might start to explain her actions, perhaps she was trying to protect Hermione from something or someone that was about to enter the room.
Maybe Rowle is under the orders of a more powerful dark wizard. In the world of Harry Potter, there are always those higher - ups in the dark side who might want Hermione for her knowledge of magic, especially things like ancient spells and magic theory. So Rowle could be tasked with kidnapping her for that purpose.
One possible motive could be to use Hermione as a bargaining chip against Harry Potter. Since Hermione is his close friend, the kidnappers might think they can force Harry to do something, like give up a powerful magical item or valuable information.
One possible motive could be Bellatrix's loyalty to Voldemort. She might think that by kidnapping Hermione, she can get information about Harry Potter and the Order of the Phoenix. Hermione is known to be very intelligent and Bellatrix could believe she has valuable knowledge. For example, Hermione might know the location of Potter or the Order's plans against Voldemort.
One possible reason could be a misunderstanding. Maybe Fleur misinterprets Hermione's actions as a threat to something or someone she cares about. So, she restrains Hermione to prevent her from causing further 'harm' until she can figure out what's really going on.
Maybe Snape is being controlled by some dark magic or a curse that makes him act this way against his normal nature.
One possible motive could be jealousy. Maybe Molly is jealous of Hermione's close relationship with her son Ron. Another could be that she feels Hermione is a bad influence on the family in some way, perhaps her non - pure - blood status makes Molly, who has some traditional views, act out. Or it could be a misunderstanding, like Hermione being wrongly accused of something that makes Molly think she's a threat to the family.
Another motive might be related to a dark object influencing her. If Hermione came across a cursed object, like a dark locket that amplified negative emotions such as envy or fear, it could drive her to kill Harry. Maybe she started to envy Harry's fame and the special attention he always got, and the locket pushed her over the edge.