Maria, codenamed "Bear Killer," serves the Shin-Yokohama Vampire Hunters' Guild while maintaining her roots as a Matagi bear hunter in a remote Mount Tanzawa hut. Her career launched after slaying a mountain-dwelling lower-vampire revealed her innate talent for the hunt.

She sports light-brown bobbed hair with elongated side strands brushing her upper chest, her sharp dark-brown eyes mirroring the intensity of her dual profession. Her combat attire reimagines a nun’s habit: a strapless black-and-blue dress with a stark white chest panel and a thigh-high slit, layered under a cropped white cape coat clasped by a silver cross. Reinforced metal-knuckled gloves, black thigh-high stockings edged with white bands, garters, and stiletto heels tipped with steel complete her tactical yet unconventional ensemble—a deliberate choice to command respect over traditional hunter garb.

Brimming with tomboyish energy and a sisterly charm, Maria defies conventions, casually referencing or adjusting her undergarments in public without hesitation. Ranked second in the guild’s popularity rankings behind Vamone, her blood type B reflects her adaptable, pragmatic nature. She seamlessly merges bear hunting with vampire eradication, approaching both roles with unwavering confidence and an unabashed embrace of her methods.