In some fanfiction scenarios, Voldemort could expose Narcissa's secrets. If she has any hidden secrets, like her true feelings towards the Dark Lord or her family's real intentions, he could reveal them to other Death Eaters. This would lead to her being ostracized or even facing more severe consequences. Also, he could use her as a human shield in a battle situation, which would put her life in immediate danger and also make her feel used and disposable.
In some fanfictions, Voldemort might hurt Narcissa psychologically. For example, he could use his power and influence to manipulate her into doing things she doesn't want to do. He might threaten her family, especially her son Draco, which would cause great emotional pain to Narcissa.
A snake could be a possible form. Given the association of the Black family with Slytherin, and snakes being a symbol of Slytherin, it would make sense for her Animagus form to be a snake. It would also tie in with the cunning and secretive nature often associated with both Narcissa and snakes.
Well, a possible plotline might be that Harry saves Narcissa during a dangerous situation in the wizarding war. This act of heroism makes Narcissa see Harry in a new light, and he in turn is drawn to her vulnerability. As they interact more, their relationship blossoms. Or, it could be that they are brought together by some magical force or prophecy that they initially resist but eventually give in to their feelings.
Another possibility is that she focuses on protecting her family, especially Draco. She could be constantly worried about the after - effects of the war on him, like potential revenge from the side that won the war, and spends her time ensuring his safety and future.
In fanfiction, Naruto might release his pain and hurt through intense training. He could pour all his emotional distress into becoming stronger, pushing his physical limits as a way to distract himself from the pain inside.
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.
The relationship dynamics are key. Whether it's her relationship with Draco, Lucius or other characters. In a great 'Narcissa Malfoy Hurt Comfort' fanfic, these relationships are used to either cause the hurt or provide the comfort. For instance, if Draco turns against the Death Eater ideals because he wants to protect his mother from further harm, that's a great plot point.
One possible plotline could be a world under totalitarian rule. Voldemort would likely impose strict pure - blood supremacy laws. Muggle - borns would be persecuted and forced into hiding or slavery. Hogwarts might be turned into a place that only teaches the Dark Arts and Voldemort's ideology. Another plotline could involve the resistance. Some brave witches and wizards might form an underground movement to fight against Voldemort's regime, with their own struggles and sacrifices.
Well, in this fanfiction, perhaps Voldemort adopts Harry because he realizes Harry has some unique power that he wants to control. As Harry grows up, he starts to understand Voldemort's motives and tries to find a way to break free. He could also form unexpected alliances with some of Voldemort's followers who have a change of heart.
Maybe Draco discovers a powerful magical artifact that can defeat Voldemort and he decides to use it for the greater good, even if it means going against his family's past allegiances. He could then face many challenges and battles before finally being able to kill Voldemort.