Aki, whose real name is Delphine Mach, has been writing and illustrating since 2008. After studying graphic design at the Duperre School in Paris, she began her career in children's books as co-author and illustrator of the Santi & Jo series. She then developed the Pan and Chat series for Gallimard Jeunesse, and wrote her book The Weather Girls. When she is not illustrating for editorial and publishing clients, Aki writes a culinary blog Les 3 Soeurs (The 3 Sisters) that she shares with her sisters (who are equally passionate about cooking). Aki lives in Berlin, Germany.