GLaDOS



GLaDOS, known in full as the Genetic Lifeform and Disk Operating System, is the central core designed to control, guide, and oversee the Aperture Science computer-aided Enrichment Center. With the ability to shift and move facilities and various chambers, she is able to achieve a seamless and almost infinite testing design.

She is the antagonist of Portal and the first half of the single-player campaign in Portal 2. In the game's cooperative campaign, GLaDOS is the testing supervisor of Atlas and P-body.

Biography
After a decade's worth of hard work, GLaDOS was officially activated in 1998, as part of one of the many events during the company's "Bring Your Daughter to Work" day. Since she is able to take control of the entire building, GLaDOS began killing most of its inhabitants by flooding the Enrichment Center with neurotoxin. However, only few if not only one of the staff such as Doug Rattmann had survived her attacks.

Now beginning the events of Portal, GLaDOS continues to operate the company and at some time-frame, awakens Chell for mandatory testing. After putting Chell through a number of tests with the Handheld Portal Device, Chell was able to escape her attempt to incinerate her at the conclusion of Test Chamber 19. From there, Chell makes her way throughout the Enrichment Center to escape, only to find that the only way she could was to confront GLaDOS in her chamber, a conflict which Chell won. During the conflict, GLaDOS was heavily damaged, and remained in a dormant status for an unspecified amount of time, during which the facility degraded.



Beginning the major events of Portal 2, she was eventually reactivated through the accidental efforts of Wheatley and Chell, the latter of whom was also trapped in the building following GLaDOS' defeat. As revenge, GLaDOS returned Chell to the facility's science experiments, and makes various taunts in hopes to crush her morale.



Abilities and Traits
As the overseer and operator of the facility, GLaDOS is seemingly omnipotent, able to reconfigure rooms and carry out actions at her will. She monitors the facility and its test chambers through cameras mounted on walls. GLaDOS had displayed little to no emotion within her voice tone in the first half of Portal, due to being bound by the consciousness of other personality cores attached onto her for the sole purpose of restricting her control. She then becomes increasingly more agitated and is portrayed as intimidating near the end of the game.

GLaDOS' consciousness had been controlled by personality cores throughout the events of Portal.

Development and Acting
GLaDOS is voiced by.

Trivia

 * Ellen McLain, the actress that provides the voice of GLaDOS, also provides the voice for the Administrator in Team Fortress 2 and the Combine Overwatch in the Half-Life series. This makes Ellen McLain the only voice present in every game included in the The Orange Box.
 * During the development of Portal 2, playtesters complained that GLaDOS was "too mean", and it was concluded that some of her dialogue was too extreme. Due to this, elements of her dialogue were reworked, which resulted in the creation of a more amicable, passive-aggressive personality for GLaDOS.