In the "Portal" series, who was Cave Johnson's personal assistant?

Caroline was Cave Johnson's personal assistant in the Portal series. She played a significant role in the game's storyline as she was not only his assistant but also the consciousness that would later become GLaDOS, the main antagonist of the series. Caroline's consciousness was transferred into GLaDOS by Cave Johnson's directive, making her an integral part of the game's plot and contributing to GLaDOS' creation.