Roboko, a blue android with feminine design recognized as female by Zvezda, was crafted by Natasha using ancient Udogawan technology linked to the civilization Kate once ruled. Rescued by Kate from subterranean tunnels, she joined Zvezda, fueled by raw mountain udo—a resource she avoids once cooked. Her dual forms include a standard mode with a solitary green camera eye and glasses, and a reinforced super form boasting twin glowing eyes and supplementary valves. Capable of expanding her size dramatically, she sheds her metallic exterior to assume the guise of a bespectacled schoolgirl, complete with shy politeness and faint blush accents.

Though typically reserved and compliant, she occasionally revels in delegating tedious tasks to Dva. The OVA highlights her shift toward spirited exuberance, contrasting her usual restraint. Loyalty anchors her to Zvezda, especially Natasha, while budding romantic feelings for Asuta Jimon add complexity to her interactions.

Beyond combat, her adaptability surfaces in non-mission contexts, such as a parody idol audition in the OVA. Functionality includes modular limb disassembly and reassembly, though this remains absent from main-series battles. Protective of allies and driven by efficiency, her pragmatic methods occasionally strain human-centric strategies favoring non-lethality.

Consistently depicted as Zvezda’s versatile operative, she merges tactical utility with comedic timing across narratives. Her role remains exclusively within the main series and OVA, unchronicled in extended media.