Rosie is a tall and slender demoness with pale gray skin, sharp pink teeth, and a 1910s bob. Her pitch-black eyes and lack of a nose mark her as a resident of Cannibal Town. Dressed in high-class maroon attire with a decorated sun hat, she exudes vintage elegance. Despite her composed and quiet demeanor, Rosie is friendly and articulate, always ready to engage in pleasant conversation. She values old-fashioned things and maintains a strong sense of composure, even in shocking situations.