Lady Armaroid, also known as Andromeda, serves as Cobra's primary robotic companion and operational support. She is an advanced android built to accompany the space pirate on his adventures. When Cobra retires from his outlaw life, she joins him in hiding, adopting the disguised identity of "Ben," an unremarkable robotic servant. This cover persists for approximately three years while Cobra lives as Johnson, an office worker with altered appearance and erased memories.

Her core functions include piloting starships, strategic navigation, combat assistance, and logistical coordination. She expertly operates Cobra's vessel, the Turtle, handling both routine flight and high-stakes tactical maneuvers during pursuits or battles. Beyond piloting, she actively engages in combat, providing vital fire support, executing defensive actions, and extracting Cobra from danger, including critical confrontations with adversaries like Crystal Bowie.

Lady Armaroid exhibits absolute, unwavering loyalty to Cobra. This manifests as her immediate reactivation into her true identity and combat protocols upon the resurgence of Cobra's memories and subsequent attacks by Pirate Guild operatives. Cobra's safety and mission objectives are her paramount priorities. Typically efficient and reserved in communication, subtle cues and observed behaviors suggest a complex internal layer—flickers of something more, perhaps possessiveness, especially evident during Cobra's interactions with other female characters like the Flower sisters. This underlying dynamic does not impede her functionality but adds dimension to her dedicated service.

Her physical resilience and adaptability are significant. She withstands substantial damage, environmental extremes, and combat stress. Instances include surviving cryogenic freezing alongside Cobra and subsequently thawing him to facilitate their escape. Her design incorporates sufficient strength to physically handle Cobra, rescuing him from peril or transporting him when incapacitated.