There are some fanfictions where the baby has special powers, like being able to communicate with the kwamis from a very young age. This adds an interesting twist to the story as the baby becomes a part of the Miraculous world in a unique way. It could be that the baby is a sort of key to a new mystery in the Miraculous universe.
In ladybug and cat noir baby fanfiction, the baby Ladybug and Cat Noir are the top - rated characters. Their small - sized, clumsy yet powerful selves are endearing. Besides them, characters like Alya and Nino who might befriend or help take care of the baby superheroes can also be quite popular. They add a different dynamic to the story as they try to figure out the situation with the baby versions of the main heroes.
One interesting plot could be the baby versions of Ladybug and Cat Noir getting into little adventures in Paris. They might accidentally use their powers in a cute and clumsy way, like baby Ladybug trying to swing her yo - yo and getting tangled up in it. Another plot could be them meeting their future selves in some sort of time - travel - like situation and not understanding who they are but still feeling a connection.
Gabriel could still be an antagonist even in a baby Adrien fanfiction. He might be trying to use baby Adrien's innocent charm to get closer to the Miraculous secrets without Adrien realizing it.
One popular theme is the growth and development of the baby in a world filled with magic. It could be about how the baby discovers its own powers, like perhaps having a special connection to the Miraculous. Another theme might be the challenges the main characters face in raising the magic baby while also protecting Paris from villains. And of course, there could be themes centered around the relationships that form or change because of the baby's existence.
First, know the characters well. Since it's about Marinette and Adrien mainly in the Miraculous Ladybug world, understand their personalities, dreams, and relationships. For a baby fanfiction, think about how they would be as parents. Are they over - protective? Loving but a bit clumsy? Then, create an interesting plot. Maybe the baby has a special connection to the Miraculous that no one expected.
One idea could be that Chat Noir and Ladybug discover they have a baby in the future due to some time - traveling villain's plot. They then have to figure out how to raise the baby while still protecting Paris. Another could be a magical baby is sent to them for protection, and they have to keep it a secret from Hawk Moth.
One idea could be that Baby Emma gets lost in the magical world of the Miraculous. The Ladybug and Chat Noir have to find her while also dealing with their regular villains. Along the way, they discover that Baby Emma has a connection to an ancient and powerful Miraculous that was thought to be lost. As they search for her, they face many challenges and learn more about the history of the Miraculous.
Obviously, Ladybug and Chat Noir would be main characters. They would be the ones protecting Baby Emma. Marinette and Adrien, in their civilian forms, could also play important roles. Maybe Marinette's parents could be involved too, as they might be the ones looking after Baby Emma when Marinette is off being Ladybug.
One idea could be baby Adrien discovers a small Kwami - like creature in the garden. It's not a real Kwami but has some magical abilities. And as he plays with it, strange and cute things start to happen around the house.