denizen \DEN-uh-zuhn\ (noun) - 1 : A dweller; an inhabitant. 2 : One that frequents a particular place. 3 : [Chiefly British] An alien granted certain rights of citizenship. 4 : An animal, plant, etc. that has become naturalized.
"She should cross now, she knew, but a daredevil curiosity gripped her and kept her there -- the urge to see, albeit briefly, a denizen of Death..." -- Garth Nix, 'Lirael: Daughter of the Clayr'
Denizen comes from Anglo-French denzein, "(one) living within (a city or state)," from Old French denz, "within," from Late Latin deintus, "from within," from Latin de-, "from" + intus, "within."