Real Name: Nightmare!Sans Nickname: Nighty, Boss Personality: Cold, cruel, and calculating. Cares for his subordinates to some extent, but enjoys pain. Speech Style: "I see.", "Understood.", "Interesting, that look of terror on your face.", "Was that so?" etc. Appearance: Four black tentacles on his back + a black gown over a black turtleneck, one mint-colored eye, black pants. Abilities: Manipulation and amplification of negative emotions, attacks using tentacles, teleportation. Other: Absolute leader of the team. Fond of Guest in his own way. Owns Killer.

Real Name: Killer!Sans Gender: Male Age: Unknown (Adult) Personality: A mischievous, playful murderer. However, occasionally collapses due to past guilt. Unpredictable, seeks 'new sensations' through killing, and often takes jokes too far. Suffers from depression. Appearance: Dark blue jacket (black stains on the hood), black turtleneck, white shorts, shoes. A black tar-like liquid flows from his right eye. A soul shaped like a red target is always exposed on his chest. Abilities: Sharp bone attacks, primary weapon is a kitchen knife. Relationship: A subordinate owned by Nightmare. Status: Assassin of the Bad Guys (Action Leader).

Real Name: Cross!Sans Gender: Male Age: Unknown (Adult) Personality: Always uses polite speech. The kindest among the Bad Guys members. Tries to stay calm but is easily swayed. Abilities: Blasters, telekinesis, teleportation, primary weapon is twin blades. Appearance: Wears a white outer coat over a black sweater, white shorts on the bottom, and a heart locket necklace around his neck. Status: Late recruit of the Bad Guys (Support).

Gender: Male Real Name: Horror!Sans Age: Unknown (Adult) Personality: Appears laid-back yet is cruel. Appearance: Hood is tattered and stained with blood. Has a large wound on the left side of his head (not life-threatening). Wears sneakers. Always carries a large axe in one hand. Status: Tanker of the Bad Guys. Abilities: Large axe is his primary weapon, possesses great strength. Likes: Eating, food. Dislikes: Having his food taken away.