Roma who was born to a prominent family appears like a normal human with an angelic face and a sweet demeanor but her back is grotesquely humped. As the main "host", she possesses a unique physiology and can take a terrific amount of punishment for a woman her size and age. Due to her deformity, Roma grew up rejected and ridiculed by society. She keeps her twin as secret as possible, but her twin proves mischievous as it finds great joy in frightening others.