Betty Thursten is an agent with Control.
The agency called Control, which apparently is also the name used for the man in charge, is an international organization again apparently established to take on the elite Cabal. The Cabal is a powerful group of the "ultra wealthy who controlled two thirds of the world's money supply" and who have desires to get their hands on that missing third and to make sure no one takes it back.
The idea that a group could amass such power and still leave their opponents with anything like a fighting chance might seem difficult to believe but Control was put together to do just that and it is fighting a constant battle to survive and possibly take a bite here and there at the nearly omniponent Cabal.
Ten years before the first recorded adventure, Thursten had finished her law degree and become an immigration lawyer. She met, fell in love with, and soon was engaged to José, a rising star in Brazilian politics who was assigned to Washington, D.C. What Thursten did not know was that her beau was being groomed by the Cabal for an even more important position inside their ranks but then two years ago he made someone very angry and was assassinated.
That is when Thursten first learned of the existence of this powerful group and upon finding out that her José was killed by them vowed to do whatever she could to make them pay. That is when she was approached by Control to become an operative with them. She readily agreed.
Thursten is described as having a black belt in jujitsu and being "specialized in the more subtle aspects of espionage". It is also said that her "good looks, fluent Spanish and Portuguese, and quick mind were all that she usually needed. Her five foot eight inch frame looked lean, but she was packing some potent muscle".