Ep. 15: Touma and allies rescue captured friends from the Queen's Fleet commanded by Bishop Biagio.
Agnese reveals she and her battle nuns are imprisoned on the Queen's Fleet. She negotiates Touma and Orsola's escape in exchange for saving Lucia and Angelene, who face brain restructuring. While Agnese confronts Commander Bishop Biagio Busoni, Touma and Orsola locate and rescue the girls, who warn that Agnese is in danger of having her brain destroyed by a spell. The group is attacked by the fleet and falls into the sea, only to be saved by Index and the Amakusa Catholics in a magical submersible. Learning that Biagio's spell can destroy cities and erase culture, the Amakusa Catholics agree to assist in rescuing Agnese. They launch an assault on the fleet, leading to a confrontation between Touma's group and the battle nuns. During the attack, Angelene is injured while protecting one of the nuns as the ships attempt to sink their vessel.
Episodes
- Ep. 11 · Tsuchimikado Bluffs Oriana While Aisa Is Attacked by Mistaken Identity
- Ep. 12 · Touma and allies race to School District 23 airport to stop Oriana and Lidvia from activating the Croce di Pietro at sundown.
- Ep. 13 · Oriana battles Touma while Lidvia attempts to activate the Apostolic Cross from outside the city.
- Ep. 14 · Touma and Index travel to Chioggia, Italy, where they encounter Orsola and face assassination attempts.
- Ep. 15 · Touma and allies rescue captured friends from the Queen's Fleet commanded by Bishop Biagio.
- Ep. 16 · Touma defeats Biagio to stop the Queen Fleet's self-destruction spell in London.
- Ep. 17 · Autumn arrives at Academy City as characters shift to winter attire and new living arrangements begin.
- Ep. 18 · Characters navigate daily life and search for Last Order in London and Academy City.
- Ep. 19 · Amata Kihara investigates the consequences of Gabriel's possession in Russia.