Criminal: An experienced criminal with a history of breaking the law. They have spent a lot of time among other criminals and still have contacts within the criminal underworld. Far closer than most people to the world of murder, theft, and violence.
Squalid. You live in a leaky stable, a mud-floored hut just outside town, or a vermin-infested boarding house in the worst part of town. You have shelter from the elements, but you live in a desperate and violent Environment, in places rife with disease.
Monster. A monsterous enemy could be something as weak as a goblin to as powerful as a ancient dragon. They consist of monsterous races and creatures. They might have done battle with the creature, been robbed by it, wanting revenge, or hunting it.