Sixth volume of the Japanese anime series. In the steampunk world of Prestale, vast airships and fleets of planes clash high above the ground as two kingdoms fight an endless war. Claus and Levie are two pilots caught up in this war after they take on a mission to deliver a young girl to the airship Silvana, only to be betrayed at the last minute. In this volume, Claus and Dio find that the Silvana has been hijacked by the Guild, while Dio is declared the official successor to his sister. Episodes are: 'Rook Dio'; 'Queen Delphine'; and 'Castling Lucciola'.