Lady Armaroid originates from advanced Martian technology of an ancient lost civilization, classified as a top-tier mechanical being. She initially concealed her identity within the robotic servant shell known as Ben, monitoring Cobra during his amnesiac period living as Johnson. Once Cobra regained his memories, she revealed her true form and resumed her partnership with him.

Her primary function is operating as Cobra's steadfast partner and piloting their spacecraft, alternately named the Tortuga or Turtle. Possessing considerable superhuman strength, she typically avoids direct combat or wielding weaponry, focusing instead on tactical support and vessel operation. Her dynamic with Cobra is defined by profound, unspoken trust and mutual reliance; each consistently aids the other during critical situations.

Throughout all narrative arcs, including conflicts involving the Royal Sisters and Crystal Boy, her role remains consistently supportive. Her operational parameters and core characteristics exhibit no significant evolution across adaptations. No additional backstory expansion or personal development occurs in spin-offs or later media beyond her established functions and origins.