The Familiar of Zero F

ゼロの使い魔F

Queen Henrietta dispatches Saito Hiraga and Louise de La Vallière to the Holy City of Romalia, where the Pope reveals that four Void users now exist across Halkeginia — and Louise is one of them. While the coalition moves against King Joseph's campaign, an older threat tied to the Void itself begins stirring. This fourth and final season closes the series around the contract that binds familiar and master.