Babette Cole is an English children's writer and illustrator. The image of the naughty princess which was created in the Princess Series makes an especially deep impression in reader's mind. This study aims to discuss free images hidden in picture books by authors by examining Babette Cole's ”Princess Series”, which includes ”Princess Smartypants”, ”Long Live Princess Smartypants”, and ”Princess Smartypants Breaks the Rules”. We analyzed what kind of painting styles Babette Cole used to construct Princess Smartypant's consciousness of freedom, as well as what kind of images and consciousness of freedom the protagonist was equipped with. The study found that Babette Cole made her illustrations more fluent, light, wild, and free through the usage of watercolor. On the other hand, the author performed the different heights of composition to show the different levels of power and presented Princess Smartypants which a higher psychological status. The design of the frame in the pictures limited self-consciousness, directly connecting with the free will of Princess Smartypants. Furthermore, Babette Cole also conveyed the female self-consciousness by illustrating the appearance, clothes, personal interests, likes and dislikes of Princess Smartypants. In these picture books, the author not only presented surfaced subversion and humor, but deeper pursuits were also hidden in picture books in the form of free image.