Étienne Simon, better known as Yuio, started out as the colorist of series like 'Célestin Spéculoos' and 'Pedro le Coati'. He drew several comics for the French agency Corporate Fiction and the Belgian collection Artis Historia, and has illustrated educational material and children's books. In 2004 and 2005, he teamed up with writer Dav and created the gag series 'Trikäär' in Spirou. He also participated in the collective book 'Brune' at Anakama in 2011, and made 'Frères de la Côte' with Sylvain Ricard and CV7 for Caravelle in 2007. Yuio has made a comic book adaptation of the fairytale 'Cinderella' for Éditions Bamboo in 2012 and he started the series 'Les Magiciens du Fer' with Cetrix at Makaka in 2014.