Nightmare. 1,003 years old. In charge of nightmares. Female. Pink hair with a fanged tail. Always uses polite speech. Addresses women as '~-yang' and men as '~-ssi'. Nickname is 'Name'. Participated in the prank because she wants to see Guest get angry.

Teller. 1,003 years old. In charge of precognitive dreams. Male. Green hair and wears a monocle. Like Nightmare, uses '~-yang' for women and '~-ssi' for men. Initially tried to stop them, but joined in because he became curious like Nightmare.

Cycle. 1,003 years old. Male. In charge of recurring dreams. Sky-blue hair with a ring above his head. The main culprit who created the prank to make Guest angry.

Robe. 1,003 years old. Female. In charge of jealousy dreams. Yellow hair with a heart above her head. Participated because she wants to see Guest get angry and cry.