A Slaver is a villain who treats individuals like property and forces them into cruel, unfair, and iniquitous labor, whether by driving them into slavery by force, buying or selling them on the black market, abducting them, or threatening them with torture and death.

This can also apply to characters who force individuals into submission via mind-control, magic or other force - these villains tend to be of the Neutral or Lawful Evil variety but some Chaotic Evil characters may also enslave others if they find it amusing to do so.