One possible theme could be self - discovery. The girl in disguise might be on a journey to find out who she really is. Another theme could be deception, as she is in disguise, so there must be some element of hiding the truth.
I think empowerment could be a theme. Maybe the girl is using her disguise to break free from certain constraints or gain power in a male - dominated society. Also, adventure might be a theme. Being in disguise often leads to unexpected situations and adventures.
One possible theme is the exploration of true identity. When love is in disguise, the characters often have to figure out who they really are and who the other person truly is.
The theme of breaking gender norms is also quite prevalent. In the Naruto universe, there are certain expectations for male and female ninjas. A girl disguising as a boy challenges those norms. It shows that girls can be just as good in areas that are traditionally male - dominated, like combat or strategic planning. They can prove themselves equal or even better than their male counterparts through the disguise.
It can help someone blend in and avoid being recognized. Like in a spy movie, a disguise can help the spy complete the mission without getting caught.
One possible theme could be family loyalty. The mom's disguise shows her dedication to her son and family despite the need for secrecy. Another theme might be identity, as both the boy and his mom may have to question who they really are in the context of their wealthy and somewhat secretive situation.
Love could be a theme. Many novels about girls often involve their experiences with love, whether it's romantic love or love within a family.
One possible theme could be self - discovery. The girl in the novel might be on a journey to find out who she really is.
It could also have a theme of family. Family traditions, values, and how they shape the Indio Girl. The family might play a role in her upbringing, her choices, and her overall story. Family can be a source of support or conflict in such a narrative.
One possible theme could be time. Since it involves a calendar, the passage of time, the significance of different months or seasons could be explored. For example, the girl's experiences could change with each new month in the calendar.
Love could be a theme. Maybe the girl falls in love and has to deal with the joys and sorrows of a relationship.
One possible theme could be self - discovery. If the girl is 'shaky', she might be in a process of finding out who she really is, which is a common theme in many novels.