A country formed by an archipelago of floating islands,

created in order to escape from the relentless attacks of the Monstra.

This arc occurs before the main storyline and tells the tale

of our protagonist’s mother Iris and the feats, sacrifices of the previous

generation against the first Regina of several hundred years.

Main Arc: Schola Stellarum

This arc occurs ten years after the Astron Tragedy and tells

the tale of our protagonist as she enters into the most prestigious high school

known to humanity—Schola Stellarum—and meets her friends as she learns about

the future of Decimas.

Transition Arc: What Lies Beyond.

This arc occurs as a transition between the next main arc and

the previous main arc, this tells the tale of the now-reborn Regina of Flame

before her awakening.

Main Arc: A Path of Flame.

This arc occurs a little after Schola Stellarum and shows the

chaos that ensued upon the awakening of the Regina of Flame.

Transition Arc: Effugium

This arc tells the tale of Yurika and her friends as they

escape from the wrath of the Station Azure which rose to prominence after the

collapse of Station Aurora.

Main Arc: A Final Wish

The final arc of Volume 1 which shows the final wish of the

Regina of Flame.

Astra

currency refers to the main currency of Astra (country), one USD is equivalent

to five Astras.

A

powerful, Monstra akin to humans—these are the most intelligent kind of Monstra

and is also the most powerful one.

These are metallic space planes used for transportation of

humans, these can be used for battle as well.

These

are metallic space ships that looks like ancient warships or pirate ships.

A vestis

is a specialized equipment powered by modified Monstra genetics or energy to

produce a powerful weapon or armor. Vestis is known to be incredibly hard to

produce and the amount of actual Vestis existing is little to eleven but there

are thousands of fake ones that still deal more power than your average weapon.

A

device used by Decimas to gather intelligence from the central database, it

also acts as an ordinary mobile device but is integrated into the eyes of a

Decima.

A powerful

unit that contains the power of a Monstra inside of them, these are human

beings who are at the frontline of the battle against Monstras.

The mother of the protagonist Yurika Stella, and the person

who brought the end of the first Monstra war. She is the first carrier of the Inherent

Vestis, Arsenal of Music which was inherited by Yurika after her death together

with her self-declared second daughter—the Regina of Corruption, Ares.

Iris is known to be one among the most beautiful people to

exist and was the strongest Decima known to Station Aurora which is why her

name still holds great influence in the world after her death.

The daughter of the first Hero—Iris Stella—she used to be mischievous

and spoiled until her mother’s death where she took upon herself a mission to bring this entire war to a stop. She

inherited the Arsenal of Music and entered into Schola Stellarum where she learned about Monstras and the path of a Decima.