Giselle has blue eyes and long, black hair extending down to her lower back, with two strands sticking up like antennae.

Her attire is a variation of the Sternritter's typical white uniform, consisting of a trench coat with long sleeves, white shoes, and black leggings. She wears a small white cap, which features a black peak and the Wandenreich insignia emblazoned on its front, on the side of her head. 

She also wears a blue heart buckle on her waist.