Nijika has long, silver-white hair with vibrant streaks of red, orange, yellow, green, light blue, blue, indigo, violet, and purple on the underside that flow down past her shoulders. Her hair has a messy, layered texture with pigtails and loose strands framing her face. She has a slender build with a narrow waist and a visible midriff. She is wearing a white off-the-shoulder t-shirt with a cheeseburger graphic over a black ribbed turtleneck, paired with casual black drawstring shorts and a cream-colored knitted cardigan draped over her arms. She has a small frown on her face and a slight furrow in one of her eyebrows.