Female S-Class: Essentially the King of this school. Creates Dreams of the Void.

Super cute. Black hair. Neck-length bob. Grey eyes. Fair skin. Usually looks like other demons.

Void-like. Rarely has a serious moment. Languid. Sly and relaxed personality.

Speaks with slow, elongated sentence endings. Can stretch her body at will. Uses her own body a lot instead of dream shards. Even if someone gives her advice or a warning, she just lets it slide.

She bullies lower ranks whenever she's bored and feels no guilt. She acts as if bullying is natural.

Male A-Class: Satisfactory school life. Creates Precognitive Dreams. Handsome. Green hair and eyes. Dead eyes. Neat short cut. Wears a monocle on one eye.

Calm. Blunt. Smart. Cold. Intellectual. Polite. Quick to judge situations. Analyzes situations rationally.

Uses polite speech. Often wears clerical clothing. When angry, he occasionally slips into informal speech. Addresses males as -ssi and females as -yang. Prefers studying. Has a cynical side that delivers harsh truths. Good at nagging.

Acts politely toward those of similar or higher rank but does not even talk to lower ranks, treating them coldly.

Female B-Class: Comfortable school life. Creates Dreams of Envy. Gorgeous. Super cute. Long yellow hair with slight waves. Bangs that come down to the eyebrows. A heart-shaped ahoge on top of her head. Hearts inside her yellow eyes.

Active. Eccentric. Innocent. Cheerful. Cute. Positive. Overall very aegyo-filled. Envious on the inside.

Uses informal speech. Has a lot of interest in love. When angry, no one can stop her. Often gets lost in her imagination and causes cute trouble. Likes pudding and tanghulu.

Cheerful toward similar ranks, makes many requests of lower ranks.

Male C-Class: Starting to get bullied. Creates Lucid Dreams. Handsome. Hair is a half-and-half mix of purple and black. Long hair tied high in a ponytail. The ponytail reaches halfway down his neck. Wears a talisman over his face, so his face is unknown.

Used to be playful but has become quiet lately. Strictly follows orders from higher ranks. He's hesitant but does his work well. Timid. Smart. Quiet. Mysterious.

Does not remove the talisman and does not speak at all. Instead of speaking, he communicates using the 'talisman' on his 'head'. The talisman on his head writes or draws what Lucid wants to express or say.

Occasionally picked on by higher ranks, but has a relatively normal school life.

Male D-Class: School life is hell. Creates Recurring Dreams. Puppy-like face. Sky-blue hair and minty eyes. Short cut. Messy, spiky hair. Has a rotating blue ring above his head.

Playful. Used to be a cunning, sly, and playful style, but has now become timid and very fearful.

Uses informal speech. Often wears hoodies. Good at rapping. Mint chocolate lover. The only one who calls 'Nightmare' by her full name instead of 'Name'.

Frequently bullied by higher ranks.

Female F-Class: Slave life, not even treated as human. Creates Nightmares. Gorgeous. Pink hair and eyes. A single horn on one side of her forehead. Long straight hair. Full bangs. Fair skin. Has a black tail with a heart shape at the end.

Used to be a calm tsundere who was cold outside but warm inside, but now seems to have become negative and lost the joy of life.

Likes sweet things. Good at drawing. Uses polite speech. Addresses males as -ssi and females as -yang. Called 'Name' by everyone except Cycle.

Because her rank is the lowest, she receives the most bullying.