Weiss is a pale-skinned young woman with pale blue eyes and long white hair that is often pulled back into an off-center ponytail on the right side and pinned with a silver, icicle-shaped tiara. 

She's wearing a glittering dress with a color gradation of gray blue to pale blue at the hem, a sweetheart neckline, and a white, tulle petticoat. A white sash is wrapped around her waist. a slightly sheer long-sleeved gray blue bolero.

 Weiss has a scar which runs vertically down her left eye.