One possible plot could be that Buffy and Spike initially struggle with the idea of having a baby. They might face challenges from the supernatural community as their relationship was always complex. Their friends could be divided in their reactions, some supportive while others worried about the implications. The baby could inherit unique powers, leading to various adventures as they try to protect it from those who might want to use its powers for evil.
In the fanfiction, the baby could be a symbol of hope for Buffy and Spike. They might find that having a child changes their relationship dynamics completely. The baby could grow up at an accelerated rate due to some magical influence, and quickly become involved in their fight against evil. Buffy and Spike would then have to balance protecting their child and allowing it to grow and use its powers for good.
One possible plot could be that Spike and Rarity, through some unexpected magical event, find themselves with a baby on their hands. They initially struggle with the new responsibility. Spike, being protective, tries to learn how to take care of the baby's basic needs like feeding and keeping it warm. Rarity, on the other hand, uses her creativity to make the most beautiful baby clothes. As the story progresses, they start to bond as a little family and face challenges together, like dealing with the baby's first illness or introducing the baby to their friends in Ponyville.
Love and family are common themes. The stories often revolve around how Spike and Buffy's love for each other is strengthened by their love for their child. It's about building a family in the midst of their dangerous and chaotic world.
Buffy would likely become more protective and nurturing. She was always a fighter, but now she has a new life to safeguard. Spike, on the other hand, might find a new sense of purpose. He could become more selfless, as his focus shifts from his own desires to the well - being of his family. For example, he might start to avoid dangerous situations more for the sake of the baby.
One popular Buffy and Spike baby fanfiction might be 'The New Beginning'. It often explores how Buffy and Spike deal with the challenges of having a baby in their complex world. Another could be 'Baby Steps' which delves into the emotional aspects of their new family dynamic.
Perhaps the story could be about Buffy and Faith being in a relationship first. Then, they decide they want to have a baby together. But it's not easy in their world. They may have to deal with the Watchers Council's disapproval. They'd need to find a safe place to raise the baby, away from the demons and vampires that are constantly after them. And they'd have to learn to rely on each other more than ever as they navigate this new chapter of their lives.
Perhaps the baby could inherit some of Buffy's slayer abilities and Angel's vampire strength. This would make the baby a very powerful and unique being. In the fanfiction, they would have to figure out how to raise and train the baby, while also keeping its existence a secret from the wrong people.
Well, Spike often claims his place in Buffy's life in fanfiction. Sometimes he claims that he understands her better than the other characters. For example, he might claim that he knows her inner turmoil regarding her slayer duties and her personal life more deeply. Also, he could claim certain powers or abilities that make him a more suitable partner for her in the fictional scenarios created by fanfiction writers.
They're popular because fans love to explore different aspects of their relationship. A baby adds a whole new dimension to Buffy and Spike's story.
In these fanfics, a likely theme is the exploration of family. Buffy and Spike are an unlikely pair, and having a captured baby in the mix forces them to deal with the idea of family in a new way. They might have to work together like a makeshift family to care for the baby. Also, the theme of sacrifice could be present. They may have to sacrifice their own wants or safety to ensure the baby's well - being.
Perhaps a grumpy old pony in town who believes that Spike and Rarity are too young and irresponsible to have a baby. He constantly tries to interfere with their parenting, making things difficult for them.