Growth and regression is also a theme. When the big sister becomes like a little sister, it can represent a step back in terms of development, which the diaper emphasizes. It could be about exploring what it means to be younger again, whether it's for fun or due to some external factor like a magical event.
In some fictional stories, there might be a magical transformation where the big sister is turned into a little sister. As a result, she now has to wear a diaper. For example, a wizard in a fairy tale casts a spell on her for some mischievous reason. And then she has to adapt to this new state of being a little girl again, including dealing with diapers.
Definitely common. Toddlers, including little sisters, have small bladders and less control over their bowel movements. They might be distracted by toys, new environments, or just having fun. And when that happens, pooping in the diaper is likely. Parents and family members often share these stories as part of the normal experiences of raising a young child.
Growth and learning can also be a theme. The big sister may teach the little sister new things like how to read or ride a bike, and at the same time, the big sister might learn patience or better communication skills through dealing with the little sister. For instance, when teaching the little sister math, the big sister has to be very patient.
Love and protection. Big sisters usually take care of their little sisters, like protecting them from harm.
Often, they show themes of sibling rivalry and love. The sisters might have adventures together or face challenges that test their bond.
Protection is a common theme. The big sister often protects the little brother from harm, whether it's from other kids or from getting into trouble. Another theme is guidance. The sister can guide the brother in school work or in making friends.
Based on the information available, it was impossible to understand the exact meaning of the sentence "Miss is not a subject". If the "accept" here referred to a character attribute in novels such as Danmei or Yuri (in Danmei novels, it usually referred to the more passive party in the relationship), it was difficult to give an exact response because the few novels in the reference only briefly introduced the relationship between the characters and did not refute or provide relevant evidence for this point of view. If "accept" is an online term with a special meaning or has a special definition in a specific group, please provide more background information so that you can answer accurately.
One common theme is protection. Big daddy is always there to protect little sister. Another theme is loyalty. They are very loyal to each other no matter what they face.
Authority is also a key theme. The big sister has a certain level of authority that she exercises. This can be seen in how she makes decisions for the family or how she enforces rules. For instance, she might decide that the family will have a no - technology day once a week, and everyone has to follow her rule. This shows her as the dominant figure in the family unit within the story.
One common theme is growth. The little sister often starts as underestimated but grows into her authoritative role. For example, she might learn to be more confident and assertive as the story progresses.