In Daikuuriku's world, everyone is born female, but at age 17, they can choose to become male or remain female. The peaceful theocracy of Simulacrum is protected by magical flying machines called "Simoun", which are only operated by young girls who have not yet chosen their sex. These Simoun possess a powerful ability known as "Ri Maajon" that can destroy large numbers of enemies at once. When the industrialized nation of Argentum decides to invade Simulacrum for its secret, war breaks out, drawing the Sibyllae (priestesses who fly the Simoun) into a lopsided battle. Due to the conflict, the Sibyllae are granted an exemption from choosing a permanent sex as long as they continue flying. Aaeru, a determined young Sibylla with a mysterious past, and Neviril, leader of Chor Tempest, Simulacrum's elite Simoun squadron, must lead their fellow priestesses through both internal conflicts within their ranks and external battles in the sky.
Aeru is a young sibylla who joins Chor Tempest as one of three replacements for combat losses during their first battle against Argentum. She quickly develops a fondness for Neviril and seeks to becom...
Neviril, also known as Sibylla Aurea and Regina of Chor Tempest, is widely regarded as the best Auriga in Simoun's entire fleet. She enjoys great admiration from both fellow sibyllae and cadets onboar...
Morinas is another replacement sibylla who joins Chor Tempest after the first battle of the war. Initially, she pursues Neviril, but eventually gives up on this pursuit. Her main interest lies in unde...
Mamiina is a skilled but arrogant Sibylle who used to work on the Arcus Niger with Chor Ignis. She was later assigned to Chor Tempest at Halcon's request. Her parents were servants in Rodoreamons fami...
Amuria was known as Nevirils Sagitta until their first battle with Argentum. She was a highly driven sibylla who had great interest in using Simouns as tools for gaining power. Alongside Neviril, they...
Paraietta serves as the second-in-command of chor tempest and is a highly respected sibylla. as an auriga, she flies alongside kaimu. paraietta possesses a strict, masculine demeanor and became part o...