SHELL and Bombshell first encountered Lady Ghost when she was hired as a bodyguard by an Admiral of the Japanese Maritime Defence Force. The admiral was involved in the purchase of a bio-weapon. She was defeated and taken into custody by Bombshell, but later escaped.
Her origins are unknown. Her pointed ears and reference to state-of-the-art Heroes Unite technology as "primitive toys" suggest an alien or futuristic origin.
Lady Ghost is inhumanly agile and tough. Her preferred weapons are a pair of pistols with adjustable settings including rapid fire, explosive and 'Shiva mode' which fires freezing rounds.