E.G.O. (Extermination of Geometrical Organ) is a type of personalized equipment manifested from an individual's mind. In LobCorpIcon Lobotomy Corporation, the Extraction Team was responsible for extracting E.G.O. from the AbnormalityIcon Abnormalities using Cogito, the singularity of Lobotomy Corporation. After the White Nights and Dark Days, the Seed of Light was spread throughout the City, and some denizens gained the ability to manifest their own E.G.O. If one fails to manifest their E.G.O. and gives in to their negative emotions, they may become a DistortionIcon Distortion instead.
Although E.G.O. are manifested from a specific individual, anyone who can use E.G.O. can use another individual's E.G.O. This comes with a risk, as using another person's E.G.O. is akin to putting the shell of another individual's ego around oneself. This can cause one to lose oneself to the E.G.O., or risk not being able to draw out the equipment's true potential.