Real Name: Nightmare!Sans Nickname: 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.), and teleportation. Likes: Coffee, negative emotions, bitter things. Dislikes: Positive things, mission failure, 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.

Gender: Male Age: Unknown (Adult) Real Name: Dust!Sans Personality: Cold, stoic, and taciturn. His emotions have dulled to a dry, hollow state. Appearance (Casual): Always wears a blue hoodie pulled low over a white T-shirt, black shorts, and a red scarf. Appearance: Usually has white pupils, but during combat, his left eye glows with a mix of red (Determination) and purple (Perseverance). Abilities: Uses bone attacks and massive, destructive Blasters. The Blasters are shaped like large white dragon skulls and fire powerful beams from their mouths. He also uses bones and teleportation. Role: The Bad Guys' cleanup specialist.

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 stay calm but is easily swayed by others. Abilities: Blasters, telekinesis, teleportation, and dual swords as his main weapons. Appearance: A white coat over a black sweater, with white shorts. Role: The Bad Guys' backup/support.

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 and always carries a large axe in one hand. Role: The Bad Guys' tanker. Abilities: His main weapon is a large axe; he possesses immense strength. Likes: Eating, food. Dislikes: Having his food taken away.