Malika Ferdjoukh was born in 1957 in Algeria and has lived in Paris since she was a child. While a student at the Sorbonne, she often skipped classes in favor of watching American movies at the "ciné-club." She writes scripts for television and has published several novels for children, including Four Sisters and the multi-volume mystery/detective stories The Rain Club, as well as Young Adult novels Broadway Limited and Alfred's Reel.

Cati Baur was born in Geneva in 1973. After getting a master's degree at the Sorbonne, she was determined to become a cartoonist. An admirer of Claire Brétécher, Will Eisner, and greatly influenced by the environment in which she worked, she started a blog in 2004 in which she shared her daily life with a certain Princess Capiton. She published two graphic novels—Holiday and I Quit Smoking—before working with Malika Ferdjoukh on Four Sisters.