Spectrum

In the folklore of many cultures, they are alleged wandering or banshee spirits or souls of dead beings (more rarely still alive), or beings of the spiritual plane, who manifest themselves among the living in a perceptible way (for example, visually, through sounds, aromas or moving objects —poltergeist—), mainly in places with which they present a link; such as those they frequented in life, or in association with their close people, in the case of the souls of the deceased.