ゼロの使い魔
"The Familiar of Zero" has been adapted into an anime series running for four seasons by the animation studio J.C.Staff. The first season aired in Japan between July 3 and September 25, 2006, and contained thirteen episodes. In April 2007 at Anime Boston, Geneon announced that they had picked up the English dubbing rights of the first season of the anime series under the title "The Familiar of Zero". In July 2008, Geneon Entertainment and Funimation Entertainment announced an agreement to distribute select titles in North America. While Geneon Entertainment still retained the license, Funimation Entertainment assumed exclusive rights to the manufacturing, marketing, sales and distribution of select titles. "The Familiar of Zero" was one of several titles involved in the deal. Funimation released a complete box set of the series on November 4, 2008. Funimation reported their rights to the series expired in August 2011. Sentai Filmworks re-licensed the first series in North America in 2013 and released it digitally. Sentai released the Geneon English-language version on Blu-ray and DVD on April 8, 2014. Hanabee Entertainment later licensed the series in Australia in February 2014.