Kurumi Minami possesses blue eyes and shoulder-length brown hair, presenting a teenaged appearance. She works as a waitress at her parents' cafe, "Hidamari," alongside her sister Nanami. A narrative shift sees Kurumi and Nanami begin approaching their childhood friend Masaru differently upon learning of his eagerness to reunite with another returning childhood friend.

Her visual design features a maid uniform: a white collared shirt, green vest, yellow necktie, white gloves, and a maid apron with a headdress. She is occasionally depicted with twintails and a hair ornament. Art descriptions note her large breasts, narrow waist, and an overall emphasis on beauty and balance, though these traits vary artistically. Her represented age also varies across sources, ranging from teen to 20 years old.

The character features in the visual novel *Cafe Junkie* and its two-episode OVA adaptation.