Yamato Maya drums for the idol band Pastel*Palettes, initially joining as a temporary studio musician while the agency sought a permanent drummer. Her status shifted to full membership after Chisato, seeing Maya without her glasses and recognizing her band compatibility despite initial doubts about her idol suitability, advocated for her.

A second-year student in Class 2-B at Haneoka Girls’ High School, Maya later attends Keiho Women's University. Her appearance features shoulder-length pale brown hair with layered forelocks and muted green eyes. She wears distinctive red half-rim glasses, switching to contact lenses during performances. Casual attire includes a white tank top, black pants with suspenders, fingerless gloves, and a blue jacket tied at her waist, often accessorized with a beige newsboy cap. Seasonal variations see her in winter turtlenecks with skirts and summer hoodies featuring cat motifs. Stage costumes typically incorporate mint and lavender themes with coordinated accessories.

Personality-wise, Maya presents as a tomboy with socially withdrawn tendencies. She speaks casually using "-ssu" verb endings while consistently addressing others with "-san" honorifics. Awkward in social settings, she becomes intensely animated discussing music equipment or drums, often rambling enthusiastically until self-correcting. Her distinctive "huhehe" laugh draws gentle reprimands from Chisato. She harbors deep admiration for Eve’s elegance and Aya’s dedication, forming close bonds with both. Hina frequently teases her due to her reserved nature. Despite insecurities about her plain appearance and initial doubts about deserving her idol position, Maya gradually embraces her role through interactions with bandmates, particularly Aya, solidifying her commitment to Pastel*Palettes.

Background elements include her drumming inspiration from Mitt Clang's drummer Kana. She belongs to the drama club as a stage technician alongside Kaoru, whose elaborate speech patterns she can interpret. Post-graduation, she pursues a driver's license. Her name is a palindrome; she uses the pronoun "jibun"; enjoys vegetable sticks and cats; dislikes dogs and fancy cuisine; fears heights; and finds comfort in confined spaces. She frequents Ryuuseidou pawnshop for drum gear, excels at carnival shooting galleries, and contributes magazine columns. Yukina once noted Maya would have been considered for Roselia had Ako not joined. In collaborations like Zombieland Saga Revenge, her alternate persona is "Legendary Gadget Geek".