Summary
Rum serves as the living doll chosen to be the face for Shirley. She is an extremely timid character who speaks very little, driven by a fear of upsetting those around her. It takes the contagious joy of Emilico to gradually help Rum emerge from her shell. Notably, Rum maintains a weaker bond with her shadow master compared to other pairs. She has an imaginary friend named Rummy, which is manifested in her left index finger and symbolized by a black ribbon, while Shirley wears a matching white one. Rum crooks her finger slightly when she appears to be conversing with Rummy. During the Debut arc, it is revealed that Rum possesses a highly effective photographic memory.
