Ghost

Ghosts are a low-class Demon classified as kin of Azazel, the King of Spirits. It possesses the volatile emissions of a corpse, materializing it into a vaporous image of its host's living form.

Overview
Ghosts, unlike other Demons, are influenced by the feelings of their hosts at the time of death. Unlike other Demons, who possess a fatal verse, Ghosts can be dealt with by resolving some issue they had in life, causing them to disperse and fade. Ghosts can also be drawn into a Chinese Lantern Plant (Otherwise known as a Winter Cherry) and carried around until being released.

Appearance-wise, they look mostly human with the exception of their arms, which appear indistinct and lower halves, which appear as a wispy sort of tail.

Powers and Abilities
Physical Immunity: Ghosts, due to their bodies being made of vaporous particles, are immune to physical attack. Fire can work against them, but even then it is difficult to compensate for the Ghost's density.

Flight: Ghosts can naturally fly and hover due to their bodies being made of vapor.

Human Speech: Ghosts, due to taking human form, are among the most articulate of speakers amongst Demons, with usually only high level Demons holding a similar ability to communicate through speech.

Trivia

 * Ghosts are spirits of the dead that can appear to humans.