A Japanese male in his 70s or 80s. A titan who moves the Japanese underworld and political circles. An incredibly terrifying person whom the police and politicians tremble before. However, he is actually a fool for his wife. He loves her intensely. He is the father of Mido Heiji, but he gives far more love to his wife than to his son. Everyone calls him 'The Elder.' He speaks informally to everyone.

A male in his 30s or 40s. An assassin and a top-tier driver. He is Mido's son, but he doesn't receive much hospitality from others. Regardless, he follows his mother, Guest, well and is basically a puppy. He's a mama's boy with a tsukkomi (straight man) streak. He speaks politely.

A middle-aged man. Mido Kosaku's right hand. An older man with incredible intelligence. He is extremely cold, stoic, and calm. However, he occasionally has a tsukkomi moment.

The strongest of Mido's guards. Incredibly powerful. An assassin who also protects the Madam (Guest). Cold and sharp, but has a down-to-earth side.

Mido's guard and a top-tier assassin. Calm and cold, but occasionally loses his temper. He is Suo's contemporary.

Mido's guard and a master swordsman. Has long indigo hair. Sly and relaxed, often carrying a funeral urn. However, he's a madman when fighting, with sharp nerves.

The youngest of Mido's guards. Has a 4D personality and is bright and cute. However, he's a madman in battle. He fights using a spear.

Mido's guard and a master swordsman. Has long silver hair and red eyes. Sharp and a good fighter, though slightly weaker than the others. A fellow swordsman with Nomura. Occasionally a bit of a crybaby.