One possible theme could be friendship - that initial connection that grew into something more. You know, starting as good friends who really understand each other.
Another theme might be self - discovery. Through your relationship with your girl, you might have learned a lot about yourself, your strengths, weaknesses, and what you truly want in life. Maybe she challenged you to be a better person and in that process, you discovered new aspects of your own personality.
Love is probably a main theme. It could be about the love between the two main characters, how they fall in love and how their relationship develops.
Recovery and hope are likely themes. The story could be about the girl's journey to recover her memories and the hope that she will be able to return to her normal life. There may be setbacks along the way, but the overall theme of hope remains.
Love could be a theme. If it's about a relationship with the pretty girl.
One possible theme could be protection. The people in the story might be protecting the little girl from various things like bullies or dangerous situations.
One possible theme could be growth. Just like many novels about young characters, the girl in 'My Little Girl Novel' is likely to experience growth both physically and mentally.
Another theme might be friendship. Innocent characters are likely to form pure and important friendships that help shape their experiences and growth. For example, she might meet someone who changes her perspective on life. And through their interactions, both characters grow. It's a common theme in many novels with an innocent protagonist.
Independence could be another theme. She is away from home, learning to manage on her own in a new environment for a short time, like getting ready for bed without her parents' help.
The themes could include adaptation. Since being turned into a little girl is a huge change, the character has to adapt to a new physical form, new social expectations, and new ways of thinking. Also, the theme of discovery could be present. Discovering the world anew as a little girl, things that were overlooked before might become important now. There could also be a theme of loss, losing the status and abilities that came with being an adult.
One possible theme could be love. It might be about the love the girl receives from her family or friends.
Friendship could be a major theme. The two girls spending time together during the sleepover, sharing experiences and having fun.