Typically, it starts with the revelation of the unexpected relationship. Then, Hermione often has to deal with the stigma of being related to a Death Eater. She might struggle with her own identity, wondering if she has any of Rodolphus' traits. Some storylines have her trying to redeem the family name or break away from the dark past associated with it.
Well, in many of these fanfictions, the plot develops around Hermione's internal conflict. Since Rodolphus is a known Death Eater, she has to face the prejudice from the wizarding world. The story could also involve her learning dark magic secrets from her supposed father's past, either to use them for good or to keep them from falling into the wrong hands. And there are often sub - plots about her friends' reactions, like Harry and Ron being shocked and having to adjust to this new reality about Hermione.
Typically, in these fanfictions, Hermione's identity as Voldemort's daughter shakes up the whole wizarding world. It usually starts with her being the only one aware of this fact. As she tries to come to terms with it, she may start to have strange dreams or visions related to Voldemort's past. These could provide her with clues about his motives and the secrets of his dark magic. Her relationship with other characters changes drastically. Her friends might be initially distrustful, but as the story progresses, they come to see that Hermione is still the same person they knew. Meanwhile, Hermione might be on a quest to find out if there are any other family members she has on her father's side, which could lead to more adventures and revelations.
One way the storyline could develop is that Hermione would struggle with her identity. She might initially be in denial about her father's Death Eater past. For example, she could discover it accidentally and then have to face the prejudice from her friends at Hogwarts. This would create a lot of internal conflict for her as she has always been a defender of justice and against the Dark Arts.
Often, it starts with the discovery of the pregnancy. There's shock and then joy. Then they start planning. Maybe they tell their closest friends first. As the pregnancy progresses, there could be some drama like a threat to Regina or the baby. Robin Hood would then step up to protect them. Towards the end, there's the anticipation of the birth and all the final preparations.
Well, often it begins with Sarada seeking Naruto's advice on something important, like her future as a ninja or her family issues. Naruto, being the Hokage, has a lot of wisdom to offer. From there, they get involved in a series of events in the village, like dealing with a new threat or helping a group of villagers. Their relationship develops as they face these challenges together, and Sarada gradually grows under Naruto's influence, both as a ninja and as a person.
As the pregnancy progresses, Bella often experiences changes that are both physical and mental. Physically, she might have a much tougher time than a normal human pregnancy because of the vampire - human mix. Mentally, she has to deal with the fear of the unknown. The story might also focus on how Edward and Bella's relationship is affected. They could grow closer as they face this new challenge together, or there could be some strains due to their different views on the pregnancy.
It could start with animosity. Rodolphus has been a Death Eater and Hermione is a Muggle - born, so there would be initial hatred. But if they were forced to work together, say in a dangerous mission to save the wizarding world, they might slowly gain respect for each other. Hermione's knowledge and Rodolphus' experience could be complementary.
In fanfiction where Hermione is Moody's daughter, it might change her role in the fight against Voldemort. Moody was a key figure in the Order of the Phoenix. If Hermione is his daughter, she could be more involved in the Order's inner workings from an earlier age. She might be trained in some of Moody's unique combat or defensive magic skills. This could make her an even more formidable opponent to the Death Eaters. Also, her identity as Moody's daughter could be used as a weapon against the Dark Lord. Voldemort might see her as a more significant threat because of her connection to Moody, which could put her in even greater danger.
The storyline in these fanfictions sometimes develops around the idea of power. A Naruto character might be seen as a powerful being in Skyrim, and this can attract both friends and enemies. Some might seek to learn from them, while others might see them as a threat. There could also be a search for a way back home, which leads the character to explore Skyrim's ancient ruins and magic. Along the way, they might encounter powerful artifacts that have an effect on their chakra or their abilities.
Typically, it might start with the discovery of their relationship. Maybe Hermione shows some unexpected abilities that link her to Natasha. Then, they could go on adventures together, with Hermione's magic and Natasha's fighting skills complementing each other.
Often, it starts with the introduction of the marriage law. Then, Hermione's reaction to it is shown. It might be shock, defiance, or immediate acceptance depending on the writer's take. For example, if she's against it, she may try to find loopholes in the law.