The main characters in the Snow White story are Snow White herself, the seven dwarfs, the Evil Queen, and the Prince. Snow White is the kind - hearted and beautiful princess. The seven dwarfs are her friends who take her in. The Evil Queen is jealous of Snow White's beauty and tries to harm her. And the Prince wakes Snow White from her enchanted sleep with a kiss.
The most important event is probably when the Evil Queen gives Snow White the poisoned apple. This is the turning point as it leads to Snow White falling into a deep sleep. It also sets up the need for the Prince to come and rescue her.
One interesting plot twist could be that the Evil Queen is actually under a spell herself. In some fanfictions, it's revealed that a more powerful dark force has manipulated her into hating Snow White. Another twist might be that Snow White has hidden powers that she discovers during her time in the forest. For example, she could have the ability to communicate with animals in a more profound way than just them being friendly towards her. And a third twist could be that the dwarfs are not what they seem. Maybe they are actually guardians of an ancient magic and Snow White's arrival was fated to unlock that magic.
I'm not sure if it's a highly popular genre specifically. Fanfiction is a vast realm with various themes. Some people might be interested in exploring different 'what - if' scenarios for Snow White, but pregnancy - related fanfics might not be as mainstream as other types. It could also be considered a bit of an odd or niche concept within the Snow White fanfiction world.
One possible plotline could be that Snow White becomes pregnant before she meets the prince. This could lead to her having to hide from the evil queen not only for her own safety but also for the safety of her unborn child. Another could be that after she marries the prince, she faces some sort of magical threat to her pregnancy. Maybe an old enemy of the kingdom tries to harm the heir. Or perhaps she discovers some special power within herself related to her pregnancy that she has to learn to control.
The dwarfs would first be in shock. They would hold a solemn funeral for her, carving a beautiful tombstone out of stone. They might become reclusive, shutting themselves off from the outside world. The prince would be furious. He would scour the land for any clues as to what happened. He might question the dwarfs harshly at first, suspecting them of some wrong - doing. The townspeople who had heard of Snow White's beauty and kindness would also be saddened. They would light candles in her memory and tell stories of her to their children for years to come.
The OC could be a fellow captive of the Mirror's evil plans. In this case, they would bond over their shared experience of being targeted by the Mirror. They could support each other, with the OC using her unique abilities to help Snow White escape from the Mirror's clutches. For example, if the OC has the power of invisibility, she could use it to spy on the Mirror and gather information to help Snow White.
In some fanfictions, the dwarfs are like Snow White's older brothers. They are very protective of her and teach her things like mining skills or how to make the best stew. Other fanfictions might show a more equal friendship. For example, they all go on adventures together in the forest, with Snow White being an equal contributor to their group. And there are also fanfictions where one of the dwarfs has a secret crush on Snow White, which adds a bit of a romantic sub - plot to their relationship.
The dwarfs would be devastated. They had come to love Snow White like a daughter or sister. They might build a grand tomb for her and keep vigil beside it, their once - happy home now filled with sorrow. Prince Charming, who was in love with her, would be inconsolable. He might go on a quest to find a way to bring her back, even if it means facing great danger. The animals in the forest that were her friends would also be deeply affected. The birds might stop singing, and the deer would look forlorn, as if they had lost their guiding light.