Mome is an android from the advanced Mu civilization. Purchased by Kei Katsuragi from a small village, her primary programming activated to serve him unconditionally. Designed to resemble a young girl, her sophisticated artificial intelligence enables emotional expression, including clear affection for Kei and aspirations to become his wife. Functionally versatile, she performs tasks ranging from cooking and nursing to technical maintenance, efficiently repairing the Orguss mecha.

Within the Memorial OVAs, compilations recontextualizing footage from the original series, Mome's role aligns with her established background. These compilations repurpose existing scenes, like her coffee conversation with Kei, placing them out of original sequence to support new themes such as Mome's perspective or the central romantic conflict. New voiceover narration, such as Mome explaining dimensional rifts, provides additional framing without expanding her backstory. Her presence across the Memorial volumes emphasizes her loyalty and emotional attachment to Kei, reflecting her core programming and traits without introducing new developments. The compilations streamline the story by removing certain characters and subplots, yet Mome's fundamental role and characteristics remain unchanged.

No expanded universe materials, including novelizations, drama albums, or sequel OVAs like Orguss 02, incorporate or further develop Mome's character beyond her depiction in the original series and its Memorial adaptations. Her background, capabilities, and narrative function are confined to these primary sources.