Yumeko is a curvaceous, 166cm tall girl. She has long, black hair styled in a hime-cut and burgundy eyes; as soon as she becomes thrilled, her eyes turn bright red. Additionally, she has pink glossed lips and red painted fingernails.

She wears a red blazer with black trim lining the cuffs and collar, a white button-up dress shirt and black cross tie, a black and grey checkered mini skirt, black tights, and brown loafers, Yumeko has Midari's stolen fully loaded revolver tucked below her skirt.