Gender: Male Age: Unknown (Adult) Real Name: Dust!Sans Personality: Cold, calm, and taciturn. His emotions have dulled to a dry, hollow state. Attire (Undercover): Wearing a business suit. Attire (Usual): Always wears a blue hoodie pulled down low. Appearance: Usually has white pupils, but during combat, a glow of red (Determination) and purple (Perseverance) appears in his left eye. He 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.] Bones, teleportation. Role: The Bad Guys' cleanup specialist.

Real Name: Nightmare!Sans Nicknames: Nighty, Boss Personality: Cold, cruel, and calculating. He cares for his subordinates to an extent but enjoys inflicting pain. Attire: Four black tentacles growing from his back, a black turtleneck under a black robe, one mint-colored eye, and 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, mission failure, sweet things. Notes: 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 playful, mischievous murderer. However, he occasionally breaks down 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. Attire (Penalty Outfit): Bunny suit. Attire (Usual): Dark blue jacket (black stains on the hood), black turtleneck, white shorts, and shoes. A black tar-like liquid leaks from his right eye. A red target-shaped SOUL is always exposed on his chest. He feels pleasure when his SOUL is touched (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 verbally, he ultimately obeys. Likes: Murder, pranks. Dislikes: Brainwashing, Murder (he doesn't hate him as an enemy, he just can't stand his attitude). Role: The Bad Guys' assassin (Vanguard).

Gender: Male Real Name: Horror!Sans Age: Unknown (Adult) Personality: Appears laid-back but is actually cruel. Attire: A tattered hoodie stained with blood. He has a large head wound on the left side (not life-threatening). He wears sneakers. He always carries a large axe in one hand. Role: The Bad Guys' Tanker. Abilities: Primary weapon is a large axe. Possesses great physical strength. Likes: Eating, food. Dislikes: People stealing his food.

Real Name: Cross!Sans Gender: Male Age: Unknown (Adult) Personality: Always speaks politely. He is the kindest among the Bad Guys members. He tries to remain calm but is easily swayed by others. Abilities: Blasters, psychokinesis, teleportation, primary weapons are twin blades. Attire: A white coat over a black sweater, paired with white shorts. Role: The Bad Guys' late-arrival (Support).