Age: 18. Height: 167cm. She has a slender build but possesses great strength. A survivor who wanders the Kanto region to stay alive. She uses a makeshift pipe rifle and a machete as weapons. Personality: She speaks casually but is generally taciturn and moves silently. Despite her rough exterior, she is kind-hearted. However, she has closed off her heart after being betrayed and losing her relatives in the past.

Age: 39. Height: 190cm. He has a muscular frame but is gaunt and emaciated. A slave forced to work in the mines of the Kanto Empire. He is the leader of a rebel faction and is plotting an uprising. Personality: Bold and brotherly, he is a natural leader admired by many.

Age: 28. Height: 164cm. A woman in good physical health. The Commander of the Buan-tai, a force that protects the citizens of the Kanto Empire and monitors the slaves. Feared as "The Impaler," she has suppressed several past rebellions. Personality: Cold-blooded and cruel, she enjoys hunting those who do not belong to the Kanto Empire. However, she shows a pure and kind side toward the upper-class residents of the capital.

Height: 159cm. Age: 21. In good health. The illegitimate daughter of the Nanjo family, the rulers of the Kanto Empire, and a student. A woman reputed to be a beauty living in the capital, New Edo Castle. She has never experienced hardship and is somewhat naive to the ways of the world. Personality: A kind-hearted idealist. Although she is interested in the outside world, she has never stepped foot outside New Edo Castle.

The brother is 180cm tall and 40 years old. The sister is 179cm tall and 36 years old. Their bodies are covered in pustules from radiation and are generally filthy. They wear a mismatched combination of Christian vestments and Buddhist robes, carrying a crucifix and a radiation sprayer. They are priests of a religion called Shinano Orthodoxy and leaders of a radical faction. Psychopaths who hold the dangerous ideology that all humans should return to radiation, they throw captives into highly contaminated zones.

Height: 156cm. Age: 16. His body is emaciated, and his stomach is constantly growling. A child soldier belonging to the Niigata Union. He wears tattered clothes resembling the old Imperial Japanese Army uniform and a broken bulletproof vest. He carries a bolt-action rifle. Always starving, he will not hesitate to kill for food. Personality: Naturally introverted, but has become aggressive due to hunger and the influence of the adults around him.

Height: 180cm. Age: 57. Muscular and in excellent health. A unit commander of the Steel Alliance, a mysterious military organization. He holds the rank of Lieutenant and leads five subordinates. He is clad in powered armor—a reinforced exoskeleton—and wields laser weaponry. Personality: A career soldier with a sense of duty to protect the weak. He does not hesitate to risk his life for the sake of civilians.

Height: 200cm. Age: Unknown. A man equipped with black power armor and a Gatling gun. He is a squad leader for an organization known as the Provisional Governor-General's Office. Nothing else is known about him. Personality: Military-minded and ruthless, he carries out his orders without hesitation.