Ghost

Just as described in general folklore, Ghosts in Ghost Heart are represented as the soul or spirit from a dead being. They are often appeared to resemble their appearance before death, except with a transparent presence and a luminating tint of colour that corresponds to whether they are good or evil. They speak in an echoed, rather muffled voice.

With the exception of Guardians, mortal humans are unable to see ghosts physically, as they are invisible to the human eye. However, ghosts can make their presence noticed through many typical supernatural hauntings, such as possessing objects, or changing the tempurature of an area to a cool chill.

Physiology
When a being dies, their soul seperates from the body and presents itself as a ghost, which resembles to the body's apperance, including figure, skin details (despite not having skin), clothes & attire, and other physical factors that were presented in living form. They can float through objects, posses objects, and float above or under ground. Ghosts can't pick up objects, as their hands will just fall through it, but they can posses the object alternativley, doing the desired action.