Miki has large brown eyes with wavy brunette hair. She is usually seen with her hair tied away in a ponytail, letting it drape over her shoulders. Mei compares her appearance to that of a doll's, having features such as "fluffy and soft hair", "perfect eyes", and "high colored lips." Miki has a petite frame and can normally be seen wearing her school uniform which consists of a navy pleated mini-skirt, a pale yellow vest, a dark blue necktie, a long-sleeved white collared button-down, and a pair of knee-high socks that she often pairs with penny-loafers.