EOs (ExtraOrdinary) are a category of humans with varying special abilities. An EO is made after a traumatic experience that resulted in their death. EOs result from the body's physiological and psychological response to a sudden, traumatic death. The transformation into an EO requires a huge influx of adrenaline, fear, and willpower to continue living. The ability that the EO gains after they come back to life is tied to their last thoughts before they died.