Wraith
The word wraiths was often used for a type of ghostly undead, marked out by having less personality, willpower, and, for lack of a better term, livelienss, than other forms of undead spirits like ghosts.
Nature
The type of “wraiths” often encountered by the Crew of the Copper-Colored Cupids were different from ghosts in that wraiths had no will of their own, nor much of a sense of self. This made them excellent henchpeople and servants for magic-users who didn't mind the ethical implications. Living people could also magically be turned into wraiths by means of cursed toadstools; the Queen of the Black Market's supplier of the same even managed to create virtual curse toadstools that could turn digital intelligences like Temps into wraiths. (PROSE: The Grand Multiverse Hotel) Wraiths of this type were also among the many kinds of spirits found in the Spirit Realm of the Prime Universe. Notably, they were considered a comparatively corporeal type of spirit relative to ghosts or poltergeists. (PROSE: The Ghosts and the Machine)
In a Limbo realm, “Limbo-wraiths” could form out of living beings' traumatic memories of the departed, but had no true existence or identity, nor even a soul. (PROSE: The Hermetic Garbage of Jenny Everywhere)
History
The Queen of the Black Market used wraiths as spies, household staff, guards and enforcers around her Interdimensional Black Market. She also used them as a source of immortality, draining their life-force to restore her own if she was injured or killed, and occasionally attempted to train individual wraiths to make them into novelty pets, such as Wallace. (PROSE: The Grand Multiverse Hotel)
On Halloween 2019, the Crew of the Copper-Colored Cupids accidentally unleashed the Great Ghost's legion from the Spirit Realm of the Prime Universe. It included wraiths among many other types of spirits, and their number was temporarily bolstered by the Queen of the Black Market's wraiths after the Great Ghost possessed the Queen's body. (PROSE: The Ghosts and the Machine)
On an unknown occasion, the Frost King was trapped by a wraith-wyvern, forcing Madame Tarsa to come to his rescue. (PROSE: The Winter Quests)