Entity (威霊, I-rei or I-ryō)?, also known as Geist, is a race of demons in the series. Demons of this race are among the ancient deities who are no longer worshiped by the disciples of the respective religion or culture.
Entity demons are created via special fusion if the player fuses any Deity, Megami, Lady or Fury, demon during a new moon with any Vile, Reaper or Tyrant demon. If the same rule is applied during a full moon, a Zealot demon will be the result.
* Asterisk denotes race that has been put under different species throughout the series. Italic font denotes the race/species name (not in katakana for Western loanword) has not yet received any official English localization.