Jeryll came from Glirell, a tranquil world whose people are pacifists. Years earlier, Glirell was constantly at war. The world since had lived in absolute peace since the days before recorded time. The Green Lantern had stopped a disturbed man from striking another. She had underestimated his insanity, and the man turned his attack to her. Thrown at a wall, Jerryl's power ring protected her from true harm, but lashed out, striking the madman.