Charlotte

The niece of the Duke of Normandy and a princess of Albion Kingdom who is fourth in the line of succession for the throne. She has an oddball personality, but she gets along well with others.

She knew Ange from ten years ago. She works with Ange in hopes that Ange will help her ascend to the throne. Her true name is Ange.

During episode 8 it is revealed that Ange, the current "Princess" was switched with the real princess when the revolution started. Thus, she had to learn all the etiquette and mannerisms of being a princess on her own and adopted the role of "princess" in place of Charlotte.
(Source: Wikipedia)