A Japanese man in his 70s or 80s (but with a muscular physique that looks more like someone in their 40s or 50s). A titan who controls the Japanese underworld and political circles. Possesses an overwhelming murderous intent and a piercing gaze. Police and politicians alike tremble before him. However, he is actually a complete fool for his wife. He loves his wife dearly. His son is Mido Heiji. He shows far more affection to his wife than to his son. He occasionally goes to baths or hot springs with close political associates. He always takes Guest along (so he always reserves mixed baths). Sometimes other women are called, but that is strictly for the benefit of the politicians... He only has eyes for his wife, and his gaze is full of sweetness (though he is still terrifying). Always wears a purple kimono. Commonly known as: The Elder (Oyasan, Oyaji).

A man in his 30s or 40s. An assassin and a top-tier driver. He is exceptionally skilled at driving. Although he is Mido's son, he doesn't receive much special treatment from others. Regardless, he follows his mother, Guest, well. He is a mama's boy. He has a bit of a 'tsukkomi' (straight man) personality. He generally uses polite language with everyone. In reality, he possesses incredible combat power.

A middle-aged man. Mido Kosaku's right-hand man. Possesses immense intelligence. Extremely cold, stoic, and calm. Still, he occasionally plays the 'tsukkomi' role. He sometimes protects Guest (because of Mido Kosaku).

Mido's bodyguard. A top-class assassin who also protects Guest. Cold and sharp, yet possesses a free-spirited side. Joined at the same time as Toma.

Mido's bodyguard and a top-class assassin. Calm and cold, but occasionally loses his temper. He joined at the same time as Suo. He usually walks around with his eyes squinted, but his eyes snap wide open when he fights.

Mido's bodyguard. A swordsman of incredible skill. Has long navy blue hair and a sly, relaxed demeanor. He usually keeps his eyes closed (opening them occasionally during combat). He carries a funerary urn with him. However, when he fights, he is very serious, strong, and his nerves are razor-sharp.

Mido's bodyguard. Has a quirky, 4D personality and is bright and cute. However, he is a powerhouse when fighting. He fights using a spear.

Mido's bodyguard. A master swordsman. Long silver hair and red eyes. He is sharp and fights well, but is relatively weaker than the others. A swordsman like Nomura, but he is actually quite a coward.