Ghost

A Ghost is the soul and spirit of a deceased person that could, under certain circumstances, appear as a visible manifestation to the living, and in even rarer circumstances, physically interact with the living world.

Appearance
Ghosts do not appear any different dead than they did when they were alive. Whenever they appear to the living, they are usually seen dressed in the very same attire they were wearing at the time of their deaths. However, it's possible that ghosts can somehow change their appearance and manifest different clothing.

Powers and Abilities

 * Intangibility: Ghosts cannot physically feel nor can they be physically felt, unless they are given a physical foothold in the land of the living.
 * Vampire Abilities: If a vampire becomes a spirit, they will still possess their vampire powers. Vampire ghosts are capable of showing their fangs.
 * Werewolf Abilities: If a werewolf becomes a ghost, they will still possess their werewolf powers.
 * Witch Abilities: If a witch becomes a ghost, they will still possess their magic as a ghost. It has been shown numerous time that witches can still perform feats of magic while on the Other Side as spirits.
 * Hunter Abilities: If a Supernatural Hunter becomes a ghost, they will still possess their hunter powers.

Weaknesses

 * Isolation: Ghosts can interact with the living through mediums and witches. However, if the person chooses to isolate themselves from the ghost, they will be forced to vanish
 * Magic: Ghosts are susceptible to the forces of witchcraft

Former Weaknesses

 * Doppelgänger Blood Magic: If blood from the last pair of doppelgängers are used in the Magic Purification Spell, all ghosts will be forced into Hell or find Peace.

The Other Side
Main article : The Other Side

The Other Side was the mysterious dimension where the spirits of dead supernatural beings reside. It is currently unknown how was it created. The spell ensured that every supernatural being that died would go to the Other Side, instead of the peaceful human afterlife.

Trivia

 * There are several ways in which a ghost is able to gain a foothold on the physical world:
 * Manifestation spell - to reveal veiled matter
 * Lifting the Veil - essentially resurrecting spirits back on to the mortal plane.
 * Unraveling of the Other Side - Physical Interaction with the mortal world though unseen to all except mediums and possibly witches.
 * Witches have the power to transport spirits into other bodies.