In a fanfic about Hermione turning into a baby, it could be a part of a time - travel plot. The time - travel magic somehow affects Hermione and reverts her to a baby. Her intelligence as an adult might still be somewhat present in her baby form, leading to some comical or interesting situations. For example, she might try to communicate complex ideas using baby sounds and gestures, and her friends would be left trying to decipher what she means.
It could be a jealous student who wants to undermine Hermione's intelligence. They might have cast the spell to turn her into a baby thinking it would be a great way to get her out of the way. This student could be someone who is always overshadowed by Hermione in class and exams.
Well, one possible plot could be that her friends have to take care of her as a baby. Harry and Ron might struggle to figure out how to keep her safe and fed. They could search for a way to reverse the spell that turned her into a baby.
Obviously, Harry and Ron would be highly involved. They are Hermione's closest friends. Harry would likely be the one leading the effort to find a solution, given his heroic nature. Ron, on the other hand, would probably be more involved in the day - to - day care of baby Hermione, with his big, caring heart.
A great plotline could be the mystery behind who turned Hermione into a baby. It could be a dark wizard trying to stop her from achieving something in the future. As a baby, Hermione might start showing some unusual magical abilities that she didn't have before, which could attract the attention of both good and bad forces in the wizarding world. And her friends would be in a race against time to protect her and find a way to turn her back.
Perhaps in the fanfic, a mysterious artifact in the wizarding world is misused which turns Hermione into a 'baby factory'. The narrative could then explore how Hermione, despite her altered state, uses her intelligence in a different way. For example, she might be able to communicate in a unique way to help those around her understand what happened and how to fix it. And also, her friends like Harry and Ron would be in a race against time to figure out the solution before it's too late.
Maybe there was a magical mishap. A powerful wizard was trying to cast a spell on another dimension but it backfired and hit Supergirl instead, turning her into a baby. In the fanfiction, Kara's friends like Lois Lane could try to take care of her in a more human way since she has lost all her powers as a baby. They would have to keep her identity a secret too.
One possibility could be that a powerful spell was cast on the superheroine by a villain. Maybe the villain wanted to weaken her and thought turning her into a baby would be the best way. In the fanfiction, the superheroine's friends would then have to figure out how to reverse the spell while also protecting the now - helpless baby version of her.
Harry would be extremely protective. He'd probably be the first to jump in and try to shield Hermione from any harm or unwanted attention. Ron, on the other hand, would be a bit more flustered at first but would quickly get his act together and use his loyalty to support Hermione.
There's a fanfiction called 'When Hermione Became a Cat'. It explores how Hermione's friends, especially Harry and Ron, react to her transformation. The story delves into their attempts to reverse the spell while also dealing with the chaos Hermione - cat causes around the castle. It's a long and detailed read that's quite engaging.