Reze appears to be a young woman or girl and is of slender build. She has shoulder-length purple hair and emerald-green eyes. She is shown to be prone to blushing heavily. She is seen wearing a choker in order to conceal the grenade pin in her neck. She wore a loose shirt with a stylized drawing of bell on the front she wore a plain white shirt and short. As the Bomb Hybrid, Reze's transformation is that of an atomic bomb, mostly reminiscent of the Fat Man wearing a dynamite apron over.