Giselle Gewelle is a Quincy and a member of the Wandenreich's Sternritter with the designation "Z" - "The Zombie". 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. Even in dangerous situations, she almost always has a happy or goofy expression on her face. Giselle has an antagonistic relationship with Candice Catnipp; she claims Candice likes to have "fun" with her subordinates, and frequently mocks her power and temperament. However, she is willing to help Candice when requested. In battle, Giselle is very cruel, using The Zombie to force several Shinigami to kill themselves while they retained awareness of their actions and begged her to stop; however, she claims to not be a sadist. She has no qualms with using her unique powers to turn the bodies of her fallen friends and comrades into weapons to fight with. Giselle frequently uses reverse psychology to trick opponents into attacking her and triggering her special ability.