Well, the plot could involve his friends or comrades having to take care of him as a baby. Maybe they struggle to figure out how to feed him the right things or keep him entertained. For example, they might try different alien foods to see what baby Keith will eat.
Obviously, Keith himself in his baby form would be a main character. His friends like Lance, Pidge, Hunk, and Shiro would also be main characters as they are the ones who would most likely be taking care of him or trying to find a cure. Maybe Allura and Coran could also be important characters, helping out with their knowledge of Altean technology or magic that might be related to Keith's transformation.
Well, perhaps it could be about a magical spell that makes Amy turn into a baby. Then the story might focus on how her friends or family deal with this sudden change, like having to take care of her in a very different way than before.
In such a fanfiction, there could be a lot of chaos. Maybe Harry and Ron would be completely clueless on how to take care of baby Hermione. They might struggle with simple things like feeding her or changing her diapers. It could also be a really cute scenario where they try their best to protect her in this vulnerable state.
Maybe it could be about a magic spell that accidentally turns Lucy into a baby. Then her friends have to figure out how to reverse the spell while taking care of baby Lucy. They might encounter various challenges and comical situations during this process.
Well, perhaps the story could start with a powerful magic spell gone wrong that turns Laxus into a baby. His friends might be shocked at first. They then have to take care of him, like feeding him and changing his diapers. It could be a really comical situation with his big, tough personality now trapped in a baby's body.
Well, in a fanfiction, it could be due to some sort of magic spell gone wrong. Maybe a villain was trying to defeat Spiderman in a new and unique way and accidentally turned him into a baby. Another possibility is that some strange scientific experiment in the Marvel universe backfired on him.
His identity might be at risk. If people find out that Spiderman has turned into a baby, it could expose his secret identity. Also, his friends and family would have to take on new roles. For example, Aunt May would have to be more of a caretaker than ever, and his superhero friends would need to protect him from villains who might see this as an opportunity to get rid of Spiderman once and for all.
The story could start with some sort of strange experiment gone wrong that turns Junkrat into a baby. The rest of the crew is shocked at first. Mei could use her scientific knowledge to try and find a way to reverse the process. Meanwhile, Reinhardt might tell stories to baby Junkrat about their adventures, as if he can understand. And Lucio could play some soft music to keep the baby calm.
Yes, there might be such fanfictions out there. The Voltron fandom has a wide variety of creative works, and this kind of alternate family relationship concept could be explored in fanfictions. However, you may need to search through specific fanfiction platforms like Archive of Our Own (AO3) to find them.