Ghost

A  Ghost was the soul and spirit of a deceased person that can under certain circumstances appear as a visible manifestation to the living.

Powers

 * 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, with Kol Mikaelson being the first to do so.
 * Werewolf Abilities: If a werewolf becomes a spirit, they will still possess their werewolf powers.
 * Witchcraft Abilities: If a witch becomes a spirit, they will still possess their witchcraft powers. The ghosts of witches were capable of using their powers in Graduation, but this was only possible because Bonnie hadn't put the veil back up.

Weaknesses

 * Isolation - Ghosts can interact with the living through mediums and witches. However, if the person chooses to isolate themselves from the spirit, they will be forced to vanish.
 * Magic - Ghosts are susceptible to the forces of witchcraft. Because the other side was destroyed by a magic spell, all the ghosts who couldn't come back to life got sucked into the dark void or found peace.

Trivia
TBA