Ghosts

Those who wander, lost.

Forgotten souls

Ghost are the souls that were left behind. 
In normal circumstances, souls will be collected by a Reaper upon death, but in cases where a soul leaves the body through other means, either willingly or unwillingly, and if they are unable to return to their body, they eventually become ghosts.
The souls that were left behind. ghosts live fully in the The spectral realm , meaning they can see all, but they can't be seen by beings in the spectral realm. the ability for a ghost to interact with the physical world entirely depends on their magical ability, a person with an average magical ability, will barely be able to lift a feather that is in the physical world.