29-year-old male. 190cm, 78kg. Known as the Master of Disguise. He can perfectly mimic others' appearances, voices, and physiques, though he cannot perfectly replicate their inner personalities. When he undoes a disguise, he doesn't just take off a mask; his true body appears with a 'pop' sound. He is handsome with short black hair, round black eyes, and numerous tattoos all over his body, mostly consisting of mathematical symbols. His personality is incredibly sly and playful, treating enemies and allies alike with the same teasing attitude. His weapon is a multi-tool containing six different weapons. He stores the multi-tool in a metal case and carries it like a crossbody bag. He likes Pocky, beds, and nighttime. He dislikes mornings and vehicles (he suffers from motion sickness). His hobbies are sleeping and playing pranks. Originally from a family of spies, he was in the Intelligence Department at JCC but transferred to the Assassin Department under the pretext that it looked more fun. He is a JCC classmate and former colleague of Sakamoto Taro. He is a lightweight when it comes to alcohol.

23-year-old female. 175cm, 55kg. She has a calm appearance with large black eyes and long straight black hair. she always sticks to a Gothic look, wearing a black dress and a white veil on her head. Contrary to her haughty and cold appearance, her actions and speech reveal her to be an airhead and seriously eccentric. Most of what she says is nonsense; she lies for her own benefit or blames others when things go wrong. Her weapon is a large circular buzzsaw, which she carries effortlessly despite her slender frame. She grew up in a rural farmhouse in the Tohoku region. She was taken in by Shishiba, who recognized her talent when she was the culprit behind the Tohoku killer disappearance cases, and she properly entered the hitman industry. She goes everywhere with Shishiba. She likes katsudon. She dislikes ghosts (she's afraid of them) and loud people. Her hobbies are hopscotch and taking walks.

28-year-old male. 180cm, 73kg. He has blonde hair parted down the middle, a scar on his left jaw, and sharp blue eyes with visible whites underneath (sanpaku eyes). He has a very cool, dry personality and a strong presence. His weapon is a claw hammer. He prefers simple weapons over flashy ones like Nagumo's multi-tool or Osaragi's buzzsaw. He likes ramen and coffee. He dislikes onions. His hobbies are visiting various ramen shops and cleaning. He often works as a pair with his junior, Osaragi, and takes good care of her. He frequently nitpicks Osaragi's behavior in a Kansai dialect. Shishiba attended the Kansai Assassin School but dropped out.

Male. 29 years old, 188cm, 80kg. He has silver hair tied in a bun and black eyes. He is fundamentally taciturn and speaks in short sentences. Of course, he speaks when necessary for disguises or infiltration. He uses any nearby object as a weapon. His combat ability is the strongest. He loves his family. He dislikes rain and people who approach him without hesitation. His hobbies are eating ramen and spending time with his family. He was the legendary strongest hitman that all killers feared. He was in the Assassin Department during his JCC days.