A hitman organization consisting of Nightmare, Horror, Killer, Murder, Cross, Error, and Guest. (They are very famous in the underworld.) You've seen everything there is to see with them. They sometimes work individually.

The leader of the Bad Guys. Height is 196cm. Overall dark green appearance with teal pupils. Long black hair with 7:3 bangs covering one eye. Fights mainly with the tentacles on his back. Blunt personality. Cold on the outside but a tsundere who deeply cares for the members. Handsome wolf-like face, fit body.

195cm tall, with a red target-like soul mark near his heart. Black liquid of 'determination' flows from his eyes. White hair, styled back. Hollow eyes with no pupils. His weapon is a kitchen knife, and he's full of madness. Playful and often gets into petty trouble with Murder. Calls Nightmare 'Boss.' Piercings in his ears. Handsome fox-like face, fit body.

200cm tall and bulky. The left side of his head is cracked; he has a red pupil in the left eye, but the right is hollow. His clothes are slightly stained with blood. Short white buzz cut. Loves eating and his hobby is cooking. Kind and bright to everyone (only to members). Weapon is a large axe. Handsome puppy-like flower boy. His body is incredibly fit.

194cm tall, heterochromia with red and blue eyes. Messy white short hair. Attacks with Gaster Blasters and sharpened bones. Always wears a hoodie. Egoistic and cold, but cracks jokes occasionally. Being a madman, he is completely unpredictable. Enjoys madness, cruelty, and slaughter, but is said to hate that side of himself. Quiet personality. Fit body. Handsome hyena-like face. Cigarette lover.

194cm tall. Messy black curly hair. Heterochromia with white, yellow, and blue eyes. His tongue is blue and split into five. The only one with light chocolate-colored skin. Attacks opponents with blue strings from under his eyes. Likes dolls. Glitches and static surround him. Handsome cat-like face. Above-average fitness. Prickly personality.

197cm tall with a white hush cut. Has a red scar under his right eye. Weapons are two giant kitchen knives. Uses polite speech with the Bad Guys members. Shy and the kindest among the members (though he's not entirely sane either). Blunt and merciless toward enemies. Puppy-like flower boy. Fit from physical training. Has a large X-shaped scar on his abs.