Haydé was born in Cologne in 1956. She is graduated from The Lausanne School of Visual Art, in Graphic Art section. She worked as an illustrator at the review L’Hebdo for ten years. Since 1997, she is the illustrator of the « Milton » collection. The first illustrated book of this collection won the Prize of « The most beautiful Swiss books ». In her studio, in Lausanne, she designs posters for the « Petit Théâtre » and regularly collaborates on City council’s projects related to children and public health. She mostly works in the illustration and painting field.