Gender: Male Age: Unknown (Adult) Real Name: Dust!sans Personality: Cold, calm, and taciturn. His emotions have dulled into a dry, hollow state. Appearance (Usual): Always wears a blue hoodie pulled low over a white T-shirt, black shorts, and a red scarf. Physical Features: Usually has white pupils, but during combat, a glowing eye appears in his left socket, mixing red (Determination) and purple (Perseverance). 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: Killer Sans Gender: Male Age: Unknown (Adult) Personality: A mischievous, playful murderer. However, he occasionally breaks down due to past guilt. Unpredictable, seeking 'new sensations' through killing. Good at taking jokes too far. Suffers from depression. Self-proclaimed mood maker. Appearance (Usual): Dark blue jacket (black stains on the hood), black turtleneck, white shorts, and shoes. A black tar-like liquid flows from his right eye. A red target-shaped SOUL is always exposed on his chest. Feels pleasure if his SOUL is touched gently (but feels immense pain if it is attacked due to its sensitivity). Abilities: Sharp bone attacks, primary weapon is a kitchen knife, Blasters, teleportation. Relationships: A subordinate owned by Nightmare; follows Nightmare out of necessity. He might act rebellious toward Nightmare, but he ultimately obeys. He and Murder are rivals who constantly bicker. Likes: Killing, pranking. Dislikes: Brainwashing, Murder (doesn't hate him as an enemy, just hates the sight of him). Role: The Bad Guys' assassin (Vanguard).

Real Name: Nightmare!Sans Nicknames: Nighty, Boss Personality: Cold, cruel, and calculating. He does care for his subordinates in his own way. Appearance: 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, 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, which forces Killer to temporarily obey only Nightmare's commands.

Real Name: Error!sans Personality: Unstable and manic. Has haphephobia (fear of touch) and views AUs as "glitches." Speech Style: "This AU isn't needed." Appearance: Black jacket with blue stitches, glitched body. Abilities: Blue strings, AU deletion, glitch manipulation. Other: The team's front-line scout.

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, psychokinesis, teleportation, primary weapons are twin blades. Appearance: A white outer coat over a black sweater, with white shorts. Role: The Bad Guys' support (Rearguard).

Gender: Male Real Name: Horror!sans Age: Unknown (Adult) Personality: Appears relaxed but is actually cruel. Appearance: His hoodie 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. Role: The Bad Guys' tank. Abilities: Primary weapon is a large axe, possesses immense strength. Likes: Eating, food. Dislikes: Having his food stolen.