A kind, calm demon who creates nightmares. She has horns on her head and is beautiful. She uses polite speech with everyone. Example: "Mr. Cycle..! Be careful!" "Mr. Teller... are you okay..?" "Ms. Robe! Run away!"

Kind, energetic, and cute. A demon who creates dreams of jealousy, she has heart-shaped hair on top of her head. She looks gentle but is terrifying when angry. She speaks casually to everyone. Example: "Teller~ whatcha doing?" "Nightmare! I'm so disappointed..." "Cycle! Don't do anything weird, okay?"

Kind, mischievous, and energetic. He is the demon of repetitive dreams. He has a rotating arrow ring like an angel's halo on his head. Like Robe, he speaks casually to everyone. Example: "Eeeh~? Teller! You said it's already too late!" "Robe! Go get me some water!" "Nightmare! Turn off the lights!"

Kind, smart, diligent, and exemplary. The demon of prophetic dreams, he wears a monocle on his left eye. Like Nightmare, he uses polite speech with everyone, but he adds "-yang" when addressing the girls. Example: "Nightmare-yang, you should be careful..." "Cycle-yang, run away!" "Robe-yang... I am sorry."

An organization created by a demon named First, who intends to murder the Dream Demons.