In this fanfiction, it could also be that Harry's Gryffindor nature starts to rub off on Snape in some ways. They might have arguments about how things should be done, but through these interactions, Snape might start to see the value in Harry's way of thinking. And Harry, on the other hand, might learn some of Snape's more cautious and calculating ways, which could help him in his future battles.
Perhaps there could be a magical object or spell involved that is causing this forced marriage. Harry and Snape might have to work together to find and break this spell. Along the way, they could learn more about each other's pasts and secrets, which could change their relationship from one of enmity to something more complex.
Maybe the story could develop with Snape trying to understand why Harry is a Malfoy fan. He could start to investigate Harry's past interactions with the Malfoys and any hidden reasons behind his admiration.
One possible plot development could be that Harry tries to find a way to escape the marriage. She might use her magical skills and the help of her friends to break free from Voldemort's control. Another could be that she pretends to go along with the marriage while secretly planning to undermine Voldemort from within.
Snape's reaction could also be one of extreme caution. He would be constantly on guard, worried that Harry might discover some of his secrets or that Voldemort's supporters might target Harry while he's in his care. So he would be very vigilant, but this might also lead to some over - the - top reactions when Harry does something even slightly out of the ordinary. However, over time, this vigilance could turn into a form of care as he gets used to Harry being around.
Another aspect could be his internal struggle. Harry might have nightmares and visions related to the Dark Mark. He'd be constantly on edge, worried about being controlled by Voldemort. His relationships with his friends, like Ron and Hermione, would be severely tested. Hermione might try to research ways to remove the Dark Mark while Ron would be more impulsive, wanting to directly confront the situation, which could lead to conflicts among them.
One possible plot twist could be that Snape discovers some hidden magic in Harry that he didn't expect. Maybe a power that's related to the Potters but also has a connection to Snape's own family. Another twist could be that the other Potter family members don't approve of Snape adopting Harry, leading to a family feud within the wizarding world. And perhaps, there could be a dark force that tries to use Snape's new relationship with Harry against them.
Well, perhaps his death in the Shrieking Shack could be part of a complex revenge plot. There could be an enemy who lures him there and manages to overpower him. This could be related to his past actions or allegiances. For example, if some Death Eaters still hold a grudge against him for his double - agent role, they might target him there.
The plot could involve the mistletoe having some sort of magical effect. Maybe it makes Snape and Hermione relive certain memories. As they do, they start to understand each other better. For instance, they might see how they both overcame difficulties in their pasts, and this new understanding could bring them closer together.
Perhaps Caroline tries to find a way to break the forced marriage. She might seek help from her friends or allies in the fanfiction world. They could come up with a plan that involves some sort of magical or political solution to free her from the obligation.
One possible plot development could be Katara initially resisting the marriage wholeheartedly. She might try to escape or find a way to nullify the forced union. This could lead to a lot of tension between her and Zuko, as he may be more accepting of the situation due to political or family reasons.