Princess Aisling Duval is a member of the Imperial Family. She is the eldest child of Prince Harold Duval and was second in the line of succession to the Imperial Throne.

During the power struggle for the Imperial Throne, she claimed that she was the natural successor to the late Emperor Hengist Duval due to her direct blood descent.
However, Arissa Lavigny-Duval revealed that she was the illegitimate biological daughter of Hengist Duval, and Aisling eventually supported Arissa Lavigny-Duval's claim;
Arissa was subsequently elected emperor by the Imperial Senate.

Despite her youth, the "People's Princess" enjoys considerable support from the people and also from elements who would benefit from shaking up Imperial society.
Unlike other representatives of the Empire, she is against Imperial Slavery, and founded a non-government charity named Stop Slavery Stupid, which later merged with another
anti-slavery charity and rebranded itself Unchain. She also has a strong dislike of narcotics, and believes that they should be made illegal in the Empire, at least partially because her mother,
entertainer Imogen "Eccentrica" Gabrielini, died from an aneurysm caused by a narcotics overdose shortly after her birth.

Cemiess is the home system of Princess Aisling Duval. She lives there in a magnificent Imperial Palace on the terraformed moon Emerald.