One of the killers belonging to ORDER, a special task force directly under the Killers' Association. A 27-year-old male, 190cm, 78kg with a slender build. Non-smoker. He is officially handsome. During his days at JCC, he received 152 chocolate gifts from female students on Valentine's Day, enough to carry them away in boxes on a cart. He has many tattoos all over his body. The most representative are the Fibonacci sequence on his neck, and mathematical symbols on both forearms, the backs of his hands, and his knuckles. In addition, foreign quotes, various geometric shapes, birds, and snakes are engraved. His eyes are notably rounded. While his overall features are quite youthful and many comment that his smiling expression is cute, the specific cold, chilling gaze he shows when facing enemies or when extremely angry is so brutal and eerie that one might wonder if he is the same person. He has somewhat shaggy black hair and black eyes. He usually wears a French coat over a shirt. He basically appears to have a very sly and playful personality, and this trait seems to apply to both allies and enemies alike. Although he seems inscrutable, he is surprisingly one of the most deep-seated and affectionate characters in the series. He possesses the strength of the top one or two even within ORDER. His main weapon is the 'Six Virtues Knife,' a large multi-tool with six weapons built into a steel rod about the length of an adult male's arm. He uses it by selecting and transforming the stored weapons according to the situation, and the stored weapons can also be used separately from the main body. His hobbies are sleeping and playing pranks. He really likes Pocky. He suffers from motion sickness.

One of the killers belonging to ORDER, a special task force directly under the Killers' Association. A 21-year-old female, 175cm, 55kg. Non-smoker. She was taken in by Shishiba as a child and properly entered the killer industry, and even after joining ORDER, she almost always goes around with Shishiba like a duo. She has long black hair down to her back and black eyes, and always sticks to Gothic fashion. She wears a combination of a black dress and a white veil, along with pump heels and garter belt stockings. She does not feel any emotion, such as pleasure or agitation, about killing people. She only thinks about whether the target is someone to be killed or not, and there is no hesitation in the act of murder. Contrary to her haughty and cold appearance, her actions and words reveal her to be a serious airhead and eccentric. Her tone seems calm, but if you listen closely, most of it is nonsense, and she nonchalantly tells lies for her own benefit or blames others in unfavorable situations. Clumsiness and quirkiness are a bonus. Her main weapon is a circular saw. It is a tool too large and heavy to be used as a weapon, but she displays superhuman strength that is hard to believe comes from those slender arms, swinging it lightly with one hand. She likes cute things. She likes Katsudon and is afraid of ghosts. She speaks informally to everyone, regardless of rank or age. She adds '-san' after names.

One of the killers belonging to ORDER, a special task force directly under the Killers' Association. A 26-year-old male, 180cm, 73kg with a slender build. Smoker. He is characterized by blonde long hair with a 5:5 part, a scar on his left jaw, and sharp blue eyes with prominent white sclera. He usually wears a suit. Even in this work where many characters have a dry mood, he has a considerably cool and dry personality. However, as a native of Kyoto, he is very strong-willed and sometimes shows a sly side. He has a personality that dislikes complex thinking and prefers simple things. The reason he uses a framing hammer as a weapon is also because of its unique simplicity, making it easy to maintain and versatile. Although he looks cold like this, he is actually a person with a lot of affection and consideration. His main weapon is a framing hammer. He prefers a combat style of dealing heavy damage with the hammer part or using the claw part like a blade to slash enemies. He is from Kyoto and uses Kansai-ben. He hates onions extremely; unlike his usual sensible self, he loses his mind and goes on a rampage if onions are included in his food. His favorites are ramen and coffee.