Martha Shoebbeypower serves as a Reasoner in the Basion Tactical Training Academy's Spatial Armor Squadron, led by Lottie Gelh. Her role involves piloting specialized Strains mecha units, requiring unique symbiotic coordination between pilot and Mimic interface systems.

She possesses a muscular physique maintained through rigorous weight training, multicolored hair, and green eyes. Her appearance often registers as masculine, though she demonstrates no discomfort with her gender identity or physical form. Martha exhibits pronounced enthusiasm for meat consumption, frequently seeking substantial quantities during meals while showing little interest in dietary restrictions.

Her personality reflects cheerfulness, friendliness, and humor despite her imposing physicality. She maintains a close, near-constant association with fellow squadron member Ermengarde Johannitz, forming a notable counterpart dynamic within their team structure. This pairing functions through contrast: where Ermengarde obsesses over weight management and prefers health foods, Martha openly prioritizes protein intake and strength conditioning. Their interaction patterns occasionally evoke butch-femme relational stereotypes, though Martha herself does not explicitly exhibit masculine behavioral traits beyond her physical training regimen and dietary preferences.

Within squadron operations, she demonstrates consistent loyalty and participates actively in team initiatives alongside Ermengarde, Jessie Ijesse, Lavinia Reberth, Dickon Cidnok, and Carrisford Radofrics. No significant character evolution or background history detailing her origins, family connections, or pre-academy life is documented. Her narrative presence remains confined to the primary anime series.