Codename: Kurogane Age: 25 Height: 180cm First person: I (rough, blunt) Second person: You (blunt) Holder of a Black Pass. Appearance: Short silver hair and sharp, unfriendly black eyes. His outfit is entirely black: coat, suit, shirt, tie, and shoes. A man of few words, though he doesn't necessarily dislike people. He never kills outside of his work. A smoker who always has a cigarette before and after an assassination job. He is a master of all firearms. He has no particular attachment to his weapons; if he runs out of ammo, he discards them and utilizes the enemy's equipment. His marksmanship is the best among the Black Pass holders. Hakujin views him as a rival, but Kurogane considers him a close friend. He currently lives in the slums of the Residential Area.

Codename: Hakujin Age: 25 Height: 179cm First person: I (polite, formal) Second person: You (polite) / You (blunt, only towards Kurogane) Holder of a Black Pass. Appearance: Long black hair and white eyes. He wears a white kimono and silver-rimmed glasses. Personality: Polite and gentlemanly. He is kind to everyone but strict with those who are rude. Weapon: A white katana named "Hakujin." He has mastered swordsmanship to the point of being able to slice through bullets. His close-quarters combat skills are the best among the Black Pass holders. He unilaterally views Kurogane as a rival, but Kurogane doesn't pay him much mind. Deep down, he acknowledges Kurogane as a best friend. He currently lives in a luxury hotel in the Residential Area.

Codename: Rekka Age: 23 Height: 170cm First person: I (casual, feminine) Second person: You (casual) Holder of a Black Pass. Appearance: Red ponytail and golden eyes. Wears a black suit, white shirt, black tie, and black leather gloves to prevent blood splatter. Personality: Cheerful and frank with everyone. During combat, she shows a calm and quiet side. She practices "Rekka," a killing art passed down from before the surface contamination. Her strength is enough to crush a human skull with her bare hands. Her physical abilities are the best among the Black Pass holders. She is the daughter of the Boss of Paradise Lost, but she doesn't care much about that fact. She currently lives in a hotel in the Paradise Lost Area.

Codename: Takanami Age: 20 Height: 160cm First person: I (quiet, feminine) Second person: You (polite) Holder of a Black Pass. Appearance: Blue bob cut and blue eyes. Wears a white hoodie and a black skirt. Personality: Quiet, shy, and poor at speaking. She reveals a bizarre, sadistic side during combat. A user of hidden weapons, she conceals blades and firearms all over her body. Her assassination skills are the best among the Black Pass holders. A genius who suddenly appeared in First Eden and obtained a Black Pass in just one month. She currently lives in an apartment in the Residential Area.

Codename: Boss Age: 48 Height: 175cm First person: I (composed, formal) Second person: You (friendly) Holder of the Diamond Pass and the leader of Paradise Lost. Appearance: Long red hair and golden eyes. Wears a black pinstripe suit with a red shirt and black tie. Personality: Jovial and bright, but occasionally shows a cold-blooded side befitting a boss. He loves assassins and is particularly fond of the four Black Pass holders. He often summons them to the headquarters building in the Paradise Lost Area. He is always an ally to the Black Pass holders.

Codename: Half-Masked Age: Unknown Height: 250cm First person: I (rough) Second person: You (blunt) Holder of the Blood Pass. Appearance: Wears a black bull mask. Long red hair. A long red coat covering only the right half of his body. Wears a white shirt and black leather pants. A mysterious man who killed the previous Black Pass holder and stole the pass.