Ghosts

Ghosts are the souls of humans, detached from their physical forms after the human's death. They remain tied to the physical world because they have “unfinished business".

Appearance
They can appear in many forms but will always be colorless and faded and look to be composed of mist or smoke. The “presence” of ghosts varies - some will just be a bit of consciousness and some will be practically an complete person, this often depends on what caused the ghost’s death and/or how long they have been dead.

Behavior
Since ghosts are lost souls, and souls are the embodiment of human emotion, ghosts tend to be very emotional. they usually channel the last emotions they felt before they died. They can only be seen by other ghosts and those with clear sight, making them lost and lonely creatures.

Abilities
All ghosts have the ability of possession, but the ease of this task depends on the "strength of will" of whoever they are trying to possess.

They also have a passive power over their place of death, affecting with with their emotions OR they have a passive(?) power over the cause of their death (ex being Lowell controlling water) OR they can just affect stuff because reasons, making stuff float, walls dripping blood, etc. If I go with this power I'd probably wanna think of an explanation