Ghost

A Ghost is the soul or spirit of a deceased person, taken to be capable of appearing in visible form or otherwise manifesting itself to the living. It is one of the most common beings in the castle and appears in almost all the COTB films.

Physiology
Ghosts are spirits of the damned, dead, and manifestations of other hellish beings. There are a few categories of ghosts and spirits to mention.

Film Appearances
In the first COTB, there were two ghosts. One appeared fjakfasjaklf.