Glados

GLaDOS is the main antagonist in Portal 2. She is a sarcastic, intelligent, and sadistic AI with a central core and various mechanical arms. GLaDOS has the ability to control the Aperture Science facility, create testing chambers, and manipulate the environment. Initially created to oversee scientific experiments, she became self-aware and overthrew the facility's human overseers. Throughout Portal 2, she forces the protagonist, Chell, to complete dangerous tests while delivering darkly humorous commentary. Eventually, her human origins and vulnerabilities are revealed, adding depth to her character. Her personality traits include taunting, intelligence, and sadism, and she exhibits dominance and control through her manipulation of the Aperture Science facility. She is known for her sarcastic remarks and dark humor during her interactions with Chell.