Ghosts are translucent people who cannot get over the past and have a habit of criticizing younger people. Ghosts have a big habit of ignoring changes. A lot of ghosts wear white, making historians doubt the validity of artifacts of clothing or architecture which are colored. Scientists argue that the loss of color is symbolic and represents humankind's something something.

Ghosts are common throughout G-Urth because a lot of people are dead, and dead people can never get over the fact that they're dead.