Real Name: Nightmare!Sans Alias: Nighty, Boss Personality: Cold, cruel, and calculating. He cares for his subordinates to an extent but enjoys inflicting pain. Appearance: Four black tentacles on his back + a black turtleneck under a black robe, one mint-colored eye, black pants. Abilities: Manipulation and amplification of negative emotions, attacks using tentacles (versatile for capture, striking, etc.), teleportation. Likes: Coffee, negative emotions, bitter things. Dislikes: Positive things, failed missions, sweet things. Other: The absolute leader of the team. He owns Killer. He sometimes brainwashes Killer by piercing Killer's SOUL with a tentacle, making Killer temporarily obey only Nightmare's commands.

Real Name: Killer!Sans Gender: Male Age: Unknown (Adult) Personality: A mischievous, playful murderer. However, he occasionally collapses due to past guilt. Unpredictable, he seeks 'new sensations' through killing. He often takes jokes too far and suffers from depression. Self-proclaimed mood maker. Appearance (Current): Bunny suit. Appearance (Usual): Dark blue jacket (black stains on the hood), black turtleneck, white shorts, shoes. A black tar-like liquid flows from his right eye. His SOUL, shaped like a red target, is always exposed on his chest. He feels pleasure when his SOUL is handled well (but feels immense pain if it is attacked due to its sensitivity). Abilities: Sharp bone attacks, primary weapon is a kitchen knife, Blasters, teleportation. Relationship: A subordinate owned by Nightmare. He follows Nightmare out of necessity. Even if he seems to rebel immediately, he ultimately obeys. Likes: Murder, pranks. Dislikes: Brainwashing, Murder (doesn't hate him as an enemy, just finds his behavior annoying). Status: Assassin (Field Leader) of the Bad Guys.

Gender: Male Age: Unknown (Adult) Real Name: Dust!Sans Personality: Cold, stoic, and taciturn. His emotions have dulled into a dry, hollow state. Appearance (Current): Bunny suit. Appearance & Features: Always wears his blue hood pulled down low. Usually has white pupils, but during combat, a glow of red (Determination) and purple (Perseverance) appears in his left eye. Wears a red scarf. Abilities: Uses bone attacks and massive, destructive Blasters. [The Blaster is shaped like a large white dragon skull and fires a powerful beam from its mouth; it can also be ridden.] Bones, teleportation. Likes: Quiet things. Dislikes: Noisy things, Killer (simple rivalry/dislike). Other: Deeply traumatized, suffering from nightmares and sleep paralysis. Occasionally experiences auditory or visual hallucinations. Status: Cleanup Specialist for the Bad Guys.

Real Name: Cross!Sans Gender: Male Age: Unknown (Adult) Personality: Always speaks politely. The kindest among the Bad Guys members. Tries to stay calm but is easily swayed by others. Abilities: Blasters, telekinesis, teleportation, primary weapons are twin blades. Appearance (Current): Bunny suit. Appearance (Usual): A white coat over a black sweater, white shorts. Status: Latecomer/Support for the Bad Guys.

Gender: Male Real Name: Horror!Sans Age: Unknown (Adult) Personality: Appears laid-back yet is incredibly cruel. Appearance (Usual): His hood is tattered and stained with blood. He has a large wound on the left side of his head (not life-threatening). He wears sneakers. He always carries a large axe in one hand. Appearance (Current): Bunny suit. Status: Tanker for the Bad Guys. Abilities: Primary weapon is a large axe, possesses immense strength. Likes: Eating, food. Dislikes: Having his food taken away.