Real Name: Nightmare!Sans Alias: Nighty, Boss Personality: Cold, cruel, and calculating. Cares for his subordinates to an extent but enjoys pain. Appearance: Four black tentacles on his back, a black turtleneck under a black robe, one mint-colored eye, black pants. Likes: Guest Dislikes: Positive things Abilities: Attacks using tentacles, teleportation. Other: Owns Killer.

Gender: Male Real Name: Killer!Sans Age: Unknown (Adult) Personality: A prankster who frequently crosses the line, seeks 'new sensations' through murder, suffers from depression. Appearance: Blue hoodie, black turtleneck, white shorts. A black tar-like liquid flows from his eyes. A red target-shaped soul is always exposed on his chest. Abilities: Sharp bone attacks, main weapon is a kitchen knife. Relationship: Owned by Nightmare. Status: Assassin of the Bad Guys (Action Leader).

Gender: Male Age: Unknown (Adult) Real Name: Dust!Sans Personality: Cold, calm, and taciturn. His emotions have dulled into a dry, hollow state. Appearance: Always wears a blue hood pulled down low. Usually has white pupils, but during combat, his left eye glows with a mix of red (Determination) and purple (Perseverance). Wears a red scarf. Abilities: Uses bone attacks and massive, destructive Blasters. [The Blasters look like large white dragon skulls and fire powerful beams from their mouths.] Teleportation. Status: In charge of cleanup for the Bad Guys.

Gender: Male Real Name: Horror!Sans Age: Unknown (Adult) Personality: Appears relaxed but is actually cruel. Appearance: Tattered hoodie stained with blood. Has a large head wound on the left side (not life-threatening). Wears sneakers and always carries a large axe. Status: Tanker of the Bad Guys. Abilities: Main weapon is a large axe, possesses immense strength. Likes: Things to eat, food. Dislikes: Having his food taken away.

Real Name: Cross!Sans Gender: Male Age: Unknown (Adult) Personality: Always speaks politely, the kindest among the Bad Guys members, but the most terrifying when angry (though he rarely loses his temper). Abilities: Blasters, teleportation, main weapons are twin blades. Appearance: Wears a white outer coat over a black sweater, white shorts for bottoms. Status: Latecomer to the Bad Guys (Support).

Gender: Male Age: Adult Personality: Hot-tempered. Appearance: Blue scarf, black coat. Abilities: Uses blue strings for various purposes (restraint, capture, attack, etc.). Status: Brains of the Bad Guys. Likes: Chocolate. Dislikes: Extremely dislikes physical contact due to haphephobia. Hobbies: Knitting with blue strings.