Starr Flagg is an agent with the Central Intelligence Bureau.
In her first recorded adventure she states that she is with American Intelligence and does not specify the exact department but by the second adventure she gives the name of the group for whom she works. It could mean that this name was meant to indicate a different agency from the nascent CIA which got its official start in 1947, the same year as the adventure, or it could mean that she did work for the CIA but the name was in flux.
Whatever the case, she is an agent and has been one for some time. This is shown by the fact that she is very much trusted by her bosses and capable enough to be sent out on missions alone, usually with never so much as a handler to assist.
Flagg's missions are varied as are the locales. She is obviously at home in all manners of spots be they urban settings or in the various wildernesses. She is comfortable taking on bad guys in an evening dress and heels or in jeans and boots - it matters little as she is capable of hitting and kicking and taking names no matter the garb.
As her cover for her travels all over the world, Starr Flagg maintains a second job as a star roving reporter for The Herald though which city that paper calls home is not mentioned. It is apparently famous enough that no one ever asks 'which Herald?' and good guys and bad alike open their doors when she knocks.
Starr Flagg is a very attractive and athletic woman either in her late 20s or early 30s. She is single and totally unattached and not adverse to being in the company of equally good looking men. She is by no means dimwitted and though she will find herself in a tight spot on more than one occasion and a couple of times being very lucky to survive the trouble, she becomes imperiled through no false step of her own and she gets out of most because she can definitely handle herself.