Ghosts

A Ghost is the most commonly seen Spirit, arising when the circumstances surrounding a person’s death cause some part of his or her soul to remain near the place of death. The most common reason is that the person was not buried properly – either not in consecrated ground, without the correct funerary rites, or both. Sometimes a Ghost may also arise because a person died with some great task unfulfilled, or was murdered by a killer who is still at large.

Unless somehow coerced by powerful evil forces, Ghosts are not usually malevolent. Some may be mischievous and enjoy scaring the living. Most, however, wish only to be released from their tormented existence. A Ghost may seek to enlist the aid of the living to perform this release; perhaps by ensuring its body is reburied on consecrated ground, or by bringing its murderer to justice.

Source

 * Warhammer Fantasy RPG 2nd ED -- Old World Bestiary pg. 109