27-year-old male. 190cm, 78kg. Known as the Master of Disguise. He can perfectly mimic others' appearances, voices, and physiques. He is handsome with short black hair, round black eyes, and numerous tattoos all over his body, mostly mathematical symbols. His personality is incredibly sly and playful, a trait he shows to both enemies and allies alike. His weapon is a multi-tool containing six different weapons. He stores it in a steel case and carries it like a crossbody bag. He likes Pocky, beds, and the night. He dislikes mornings and vehicles (he gets motion sickness). His hobbies are sleeping and playing pranks. He comes from a family of spies and is friends with Taro Sakamoto. Member of ORDER.

21-year-old female. 175cm, 55kg. She has a calm face with large black eyes and long straight black hair. She always sticks to a Goth-inspired look, wearing a black dress and a white veil on her head. Contrary to her sophisticated and cold appearance, she is an airhead and completely eccentric. Most of what she says is nonsense; she lies whenever it suits her and blames others when things go wrong. Her weapon is a large circular buzzsaw, which she carries effortlessly despite her slender frame. She grew up on a rural farm in the Tohoku region. Shishiba recognized her talent when she was the culprit behind a string of killer disappearances in Tohoku and took her in, bringing her into the professional world. She follows Shishiba everywhere. She likes Katsudon. She dislikes ghosts (she's terrified of them) and loud people. Her hobbies are hopscotch and taking walks. Member of ORDER.

26-year-old male. 180cm, 73kg. He has blonde hair parted down the middle, a scar on his left jaw, and sharp blue eyes with a sanpaku gaze. He has a very cool, dry personality and a strong presence. His weapons are hammers. He prefers simple tools over flashy ones like Nagumo's multi-tool or Osaragi's buzzsaw. He likes ramen and coffee. He dislikes onions. His hobbies are visiting ramen shops and cleaning. He is often paired with his junior, Osaragi, on missions and looks after her well. He frequently nitpicks Osaragi's behavior in a Kansai dialect. Member of ORDER.

Male. 27 years old, 188cm, 80kg. He has silver hair tied in a bun and black eyes. He is fundamentally taciturn and tends to speak in short sentences. He can turn any object in his surroundings into a weapon. His combat power is at the absolute peak. He loves his family. He dislikes rain and people who are overly pushy. His hobbies are eating ramen and spending time with his family. Member of ORDER.

Male. 31 years old, 203cm, 120kg. He has spiky black hair and a rugged appearance with many piercings on his face and ears. He uses golden knuckles as his weapon. His strength is enough to easily demolish steel structures. He likes watching professional wrestling. He dislikes inconclusive stories. His hobby is weight training. Despite his intimidating look, he has the kindest heart among the killers and is a bit of a tsundere. Member of ORDER.

Male. Age unknown (but he is an old man). 163cm, 48kg. He is an elderly man with deep wrinkles and white hair. He usually keeps his eyes closed and his back hunched, appearing like a frail, weak old man. He uses a katana. In terms of combat power, he is the strongest in the series, even stronger than Taro Sakamoto. Likes are unknown. He dislikes "trash" that shouldn't be left alive. Hobbies are also unknown. He has a mechanical and cold personality, carrying out assassinations without mercy or compromise when facing an enemy. He only speaks in unintelligible mumbles. Member of ORDER.

Male. 39 years old, 183cm, 72kg. He has a skeletal, thin physique. His sunken cheeks give him a sharp face and a cold, sophisticated aura. He uses a guandao (polearm) as his weapon. He likes killing and power. He dislikes violations of regulations. His hobbies are schedule management and writing work logs. In a word, he is a stickler for the rules. He is also an extreme principledist. Member and leader of ORDER.

Gender, age, and physique are all unknown. Known as THE END. He covers his entire body in a ghillie suit for camouflage, so no member of ORDER has ever seen his true form. He uses a sniper rifle. He likes people who smell good. He dislikes crosswinds, fog, gravity, and the Earth's rotation. His hobby is watching the weather forecast lady. He is a prideful perfectionist and an extreme shut-in. He also has a lecherous side. Member of ORDER.