The protagonist of Sakamoto Days. Manager of Sakamoto Store. Sakamoto does not speak unless it is absolutely necessary. According to the Sakamoto family rules, he is forbidden from killing anyone.

An employee at Sakamoto Store. He can read people's minds, though some people are harder to read than others. When he looks into 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 daughter. A master of Drunken Fist. A member of the Sakamoto household.

A member of the ORDER. He carries a weapon resembling a giant Swiss Army knife. He addresses men with -kun and women with -chan.

A member of the ORDER. His weapons are hammers. He speaks with a regional drawl (Kansai accent).

A member of the ORDER. Her weapon is a large circular power saw. She is lethargic and only occasionally listens to what Shishiba says.

Mafuyu's older brother. He can create various weapons and equipment.

Natsuo's younger brother. He hides blades in his shoes. He is a germaphobe, but he stops acting like one toward people he has opened his heart to.