Beings such as spirits, ghosts, wraiths or poltergeists that can perform feats such as walking through solid matter are Noncorporeal or Incorporeal. They are feared by the still-living as they cannot be stopped and/or contained through conventional means.

Examples

• Usually they're Deceased, but can be from a realm not completely in-phase with ours (e.g. Freddy Krueger and Bathsheba Sherman). Or be treated as another species rather than people who have died (e.g. Boos)
• If Possessors and/or Brainwashers are involved and focus on the Possessed/Brainwashed then it does NOT qualify; instead use Possessed Objects or anything similar.