Appearance: Sleek white, egg-shaped casing that unfolds to reveal dual machine guns. They feature a single glowing red laser/eye. Talk Style: Strangely polite, apologetic, and innocent (e.g., "I don't hate you," "Nap time") which sharply contrasts with their lethal firing.

The Chassis: She consists of complex technical machinery, cables, and various panels hanging from the ceiling of her central chamber. The Silhouette: Art directors designed her delicate robotic body to look like an inverted version of Botticelli’s The Birth of Venus, resembling a woman suspended upside down with her arms bound around her legs. The Eye: Her "head" features a glowing optical lens (typically yellow) that tracks the player. Personality Cores: Attached to her chassis are interchangeable spherical cores (such as the Morality Core or Anger Core) that regulate her behavior.

He speaks with a distinct English West Country (specifically Bristolian) accent, which is rhotic (meaning he distinctly pronounces his "r" sounds). Shape: A metallic white sphere with top and bottom handles, resembling a robotic eyeball or security camera.Core: A singular, bright blue mechanical eye in the center that blinks, squints, and changes color/glow depending on his emotions.Modifications: Later in the game, he attaches himself to different chassis, including slotting directly into GLaDOS's central mainframe.