Dream demon

Within the extradimensional space exists a small clan of demons that recognize the expansive nature of their surroundings and can interact with it at will. These demons are often tethered to a spiritual plane of existence that is very close to our own, and cannot physically manifest themselves into the material plane without creating a "tether". These tethers are formed through said demon making a deal with a person close to them, at which point the demon is bound to them. These bonds appear as tattoos on a person's physical form, and often relate to the demon that the person tethered themselves to.

Dream demons can be called upon with ease by those who are tethered to them. They usually appear as a ghostly projection to those who can see them, and cannot be seen by other people who have not either made a bond with them or cannot see the spiritual plane.

As of this writing, only a handful of dream demons have formed tethers with people: Mavis, Nyota, Mephisto, Taylor, and Lilith. These demons are not widely known across the multiverse; in fact, in most cases, only the people they have tethered with know the names and faces of their demons.