Well, there could be a fanfiction where Kai and Bonnie's baby is a key to saving their world. The story might focus on how they protect the baby from those who want to use its power. It could also involve other characters from their universe helping them in this task.
Some common themes could be love and protection. Since it involves a baby, the idea of protecting the innocent life might be prominent. Also, the relationship between Bonnie and Kai could be explored in the context of this new addition to their 'world' in the fanfiction, like how they adjust to being parents or caretakers.
When writing a Kai and Bonnie baby fanfiction, it's important to set the right tone. Since they are from a magical world, you can use that to your advantage. Describe the world they are raising their baby in, whether it's a spooky place like Kai might be used to or a more nature - filled place like Bonnie might prefer. Also, think about the baby's character. Will it be a troublemaker or a calm child? Build the story around these elements.
It could be other supernatural beings who might see the baby as a threat or a powerful tool. Maybe some dark witches or warlocks who want to use the baby's power for their own evil purposes.
One popular theme is redemption. Kai is often a character in need of redemption, and in many fanfictions, Bonnie becomes the catalyst for that change. Their relationship is explored in the context of Kai trying to make up for his past misdeeds.
One great 'bonnie kai fanfic' could be about their adventures in a magical realm. Maybe they discover a hidden power together and have to fight against an evil force. They could learn from each other's strengths and weaknesses along the way.
One great Klaus and Bonnie baby fanfiction could be about how they deal with the challenges of raising a baby in a world full of supernatural threats. Maybe they have to protect the baby from other vampires or witches who might see the child as a threat or a valuable asset.
One interesting story could be about how Bonnie and Damon's baby has special powers due to their unique heritages. The baby might be able to control magic in a way that surprises both of them.
Some Damon and Bonnie fanfiction stories revolve around fixing the broken parts of their relationship. In the original series, they had a complex dynamic. Fanfictions often take this and expand on it. For instance, there are stories where Damon has to earn Bonnie's trust back after some misdeeds. These stories can be really engaging as they show the characters growing and changing. Also, there are those that explore how they would interact if Bonnie had different powers or if Damon had a different backstory. It adds a new layer to their relationship and makes for interesting reading.
One popular kai fanfiction could be those that explore Kai's adventures in different magical realms. For example, in some stories, Kai might travel to a realm full of talking animals and have to solve a mystery there to save his own world. Another type could be about Kai's relationships, like his friendship with other characters and how they grow and change together through various challenges.
One interesting story could be where Cinder and Kai have a baby who shows extraordinary intelligence from a young age, inheriting Cinder's strong will and Kai's leadership skills. The baby might play a key role in bringing about new technological advancements in their world.