It is established in the Fae universe that beings beyond death exist.
There are different kinds of ghosts and spirits:
The English word spirit (from Latin spiritus "breath") has many differing meanings and connotations, most of them relating to a non-corporeal substance contrasted with the material body. The word spirit is often used metaphysically to refer to the consciousness or personality. The notions of a person's spirit and soul often also overlap, as both contrast with body and both are understood as surviving the bodily death in religion and occultism, and "spirit" can also have the sense of "ghost", i.e. a manifestation of the spirit of a deceased person. The term may also refer to any incorporeal or immaterial being, such as demons or deities. In Christianity "the Spirit" (with a capital "S") specifically denotes the Holy Spirit.