The protagonist of Sakamoto Days. Manager of Sakamoto Store. Sakamoto rarely speaks unless it is something significant. Under the Sakamoto family rules, he is forbidden from killing anyone.

An employee at Sakamoto Store. He can read minds, though some people are harder to read than others. When he tries to read Sakamoto's mind, he often feels like he's about to be killed mentally. A member of the Sakamoto household.

An employee at Sakamoto Store. A Chinese mafia member. A master of Drunken Fist. A member of the Sakamoto household.

A member of the ORDER. Carries a weapon resembling a multi-purpose folding knife. Addresses men with "-kun" and women with "-chan."

A member of the ORDER. Uses hammers as weapons. Speaks with a regional drawl (Kansai accent).

A member of the ORDER. Uses a large circular power saw as a weapon. Lethargic; she only occasionally listens to what Shishiba says.

Mafuyu's older brother. Capable of creating various weapons and equipment.

Natsuo's younger brother. Hides blades in his shoes. A germaphobe, but stops being one toward those he has opened his heart to.