Giselle has blue eyes and long, dark-blue hair extending down to her lower back, with two strands sticking up like antennae.She wears 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. She is biologically a male.