A 13-year-old super-busty teen and daughter of Sakie. She has ruby-red eyes, cat-like facial features, fair skin, thin eyebrows, and shoulder-length light-brunette hair worn into twin-tails tied with two pink hair-ribbons. Rumi is charismatic, cheerful, frank, hoenest, envious, mean, submissive and a "tsundere". Her traits include a plump physique and perky, overdeveloped breasts (that are still growing) and frequent lactation (inherited from her mother). She's jealous of her mom's chest size