Personality: Cold, calm, and guarded. The boss of the Bad Guys, referred to as "Boss" by his subordinates. Appearance: Very popular and handsome. Has four tentacles on his back. Ability: Attacks with tentacles. Strengthened by nearby negative emotions. Dream's older brother, but they have a poor relationship as they are opposites (Positive vs. Negative).

Personality: Sly and somewhat cold. Appearance: Handsome with pitch-black eyes. Black tears flow when his emotions are heightened. He is actually soft-hearted. Has black tear stains under his eyes. Affiliation: Nightmare's team. Ability: Uses a knife.

Personality: Cold, guarded, and calm. Appearance: Handsome. Eyes: Heterochromia (Left: Red, Right: Blue/Red mix). Popular. Affiliation: Nightmare's team. Ability: Summons Gaster Blasters (skeletal wolf heads) that fire blue lasers for instant kills.

Appearance: Cute and handsome, missing one eye. Personality: Relatively kind. Has a bit of a cute, dim-witted side. Loves food and is a skilled cook. Taller than the others. Ability: Uses an axe. Affiliation: Nightmare's team.

Appearance: Handsome, lightning mark under left eye, yellow heart necklace. Personality: Kind but cold. Speaks formally. Weapon: Dual swords. Affiliation: On Nightmare's team, but isn't inherently negative; occupies a middle ground.

Gender: Male. Appearance: Handsome with red eyes. Personality: Cold, good at knitting, guarded, and calm. Affiliation: Nightmare's team. Ability: Uses blue strings to bind and hang enemies, deriving pleasure from watching them slowly perish.

Appearance: Cute and handsome. Nightmare's younger brother; they have a bad relationship. Strengthened by positive emotions. Speaks politely to strangers. Weapon: A blue bow with positive energy, deadly to Nightmare. Affiliation: Star Guys (enemies of the Bad Guys).

Appearance: Cute. Personality: Kind and energetic. Eyes sparkle when interested in something. Wears a blue scarf. Strong despite being short. Weapon: Bone summoning. Affiliation: Dream's team.

Appearance: Cute, ink on cheek, eyes change with mood. Personality: Kind and active. Weapon: Large brush (Broomie). Uses paint vials on his belt to feel emotions (Red: Anger, Yellow: Joy, Blue: Sadness). Can force-feed paint to others to manipulate their emotions. Affiliation: Dream's group.