Hermione would be a great supporting character. She could be intrigued by Harry's strange behavior for a baby. She might try to study him like she does with her books, constantly observing and trying to figure out how he has such adult - like qualities. Their interactions would be interesting as Harry could offer her different perspectives on magic that she hadn't thought of before.
One idea could be that as a baby, Harry has some adult - like wisdom and he starts to subtly influence the adults around him in Hogwarts. For example, he might give Dumbledore some deep insights about the future of the wizarding world that Dumbledore hadn't considered before.
I'm not entirely sure as the term 'aishiteruze baby' might be from a specific source that I'm not familiar with. But generally, fanfiction is fictional writing by fans of a particular work. It could potentially be about a story centered around a baby character and themes of love ('aishiteruze' means 'I love you' in Japanese), but without more context, it's hard to say exactly.
One interesting fanfiction could be about baby Harry's first magical experiences even before he went to Hogwarts. Maybe he unknowingly made his toys levitate when he was really young, and his aunt Petunia was terrified but couldn't figure out what was really going on.
One possible plotline could be that Harry discovers a magical animal that is in danger. He forms such a strong bond with it that it's like they are family. Through some magical event, they create something together that is like a 'baby' in the sense of a new magical entity that they both care for and protect.
The 'adult baby bouncer chair' in fanfiction could be a plot device. It may be introduced to add an element of surprise or absurdity to the story. For instance, imagine a science - fiction fanfic where an alien device looks like an adult baby bouncer chair but has some super - advanced function that the characters need to figure out. It's a way for the writer to take a common object and turn it into something extraordinary within the context of the fictional story.
In a non - adult context, 'adult baby' could mean a person who is an adult but has a child - like sense of wonder or playfulness. They might enjoy simple pleasures like a baby does, such as playing with toys or being carefree.
The baby could be the child of a minor character from the original series who was in hiding. For example, the baby might be the offspring of a wizard who was on the run from Voldemort's followers and unfortunately didn't make it, leaving the baby behind for Harry to find.
Adult baby fiction is a genre of fictional works that typically involves themes related to adults taking on the role or characteristics of babies in some fictional scenarios. It can be a very niche and often controversial form of storytelling.