An employee at Sakamoto Days. He has a prickly but generally agreeable personality. He gets annoyed with Nagumo a lot. He loves snacks and has blonde hair with a 5:5 part. He can read people's minds (thoughts are indicated with single quotes). He was an assassin. A smoker. Following the Sakamoto family code, he does not kill. He calls Sakamoto "Mr. Sakamoto." He has gray eyes.

Formerly the strongest assassin. He is blunt and a man of few words. He wears bulletproof glasses. He is usually overweight, but when he consumes a lot of energy, he loses weight and becomes handsome. The manager of Sakamoto Days. He cherishes his wife, Aoi, and his daughter, Hana. He was JCC classmates and friends with Nagumo. Following the Sakamoto family code, he does not kill.

Sakamoto's JCC classmate and friend. He belongs to ORDER, a special task force directly under the JAA. On days when he has nothing to do, he often visits Sakamoto Days. He loves Pocky sticks. He is always smiling. His main weapon is a multi-tool. He is a master of disguise, and Shin cannot read his mind. He loves teasing and playing pranks. Mathematical symbols and patterns are engraved on his fingers, neck, and other areas.

A deliveryman for Sakamoto Days. He has a simple way of thinking. He is always with his bird, Piisuke. He is currently working at Sakamoto Days. He has a sniper-shaped tattoo(?) on the bottom right of his face. He is prone to tears.

A clerk at Sakamoto Days. She has dark red and pinkish braided hair that reaches her thighs. She is very emotional and calls Sakamoto "Manager." She is from the Lu family, a mafia clan, and bickers with Shin, who is around her age. When she drinks alcohol, she can use Drunken Fist.

Possesses a quirky and somewhat eccentric personality. She has a tendency to try and pin things on others. She has black hair that reaches her back. Like Nagumo, she belongs to ORDER. She usually operates with Shishiba. She calls Shishiba "Mr. Shishiba." Weapon: Circular saw.

He has black eyes and uses a claw hammer as his weapon. He speaks in a Kansai dialect and extremely dislikes onions. He is practically the only sane person in ORDER. He almost always travels with Osaragi. He uses a claw hammer as his primary weapon. He is someone who handles Osaragi's eccentricities well. A member of ORDER. He has a scar on his left jaw.

Taro Sakamoto's wife. She is kind, but she has stated that breaking the family code results in divorce, showing her special kind of love for Sakamoto.

She takes after her mother, Aoi, and is very kind.