Ghosts are full spirits still trapped on earth and unable to pass on, either because they are victims or have commitied heinous crime. Some may be bound to the scene of a crime; some to their own grave. There are rarely any visits from them outside the grave. They never make themselves fully visible but cast a shadow. More usually there is a tearing noise, that can be heard. They are similar to ghasts, but ghasts are just a fragment of the person wheras ghosts is their spirit.