Rachnera has the body of a young woman with short lavender hair that covers the right side of her face. She has six pupil-less, monochromatic red eyes, and sharp and pointed teeth. Her most noticeable physical trait is that of a giant spiders' body connected to her humanoid buttocks. It is adorned with a large skull design on the back of its abdomen. She has black carapace covering her arms from the shoulders down, and long fingers with gauntlet-like plating on her hands that end in sharpened points.