The story centers Jin Kisaragi, his sister Saya and Ragna, and their adventures when they met other character of the story. Jin Kisaragi former Commader and Major of Novus Orbis Librarium. And also a member of 4th Thaumaturgist Squadron. He is a slender good-looking young man with short stylish blond hair, green eyes, wears the Novus Orbis Librarium uniform; turtleneck black top paired with leggings over a white Japanese style garment, red linered sapphire colored jacket with long detached sleeves, white gloves and military boots. When he was a child, he wears sky blue t-shirt paired with black shorts and also wore Japanese tradition shihakusho uniform when he was adopted by Kisaragi’s clan.

Saya, the younger sister is used by Hades Izanami, the Goddess of Death. Saya has very long violet ponytailed hair with soulless red eyes, wears a red and white Japanese empress outfit tied with a light blue sash, dark cape over the shoulders and a golden crown. As a child, she had medium-length blond hair, green eyes, and wore a white dress. Ragna the Bloodedge is a young adult wanted criminal with white spiky hair and heterochromia: his left eye is green and right is red, wears modern and futuristic old features red and vibrant jacket with two long tails hanging in the back over a black shirt, and three red belts, and red steel-toed boots. His arm was prosthetic. In his mid-teens, he had blond hair, green eyes, wears a traditional Japanese style red turtleneck sleeveless top with long black gloves up to elbows, black baggy bottom and red shoes.