Kumi Tanaka is a resident of the Maison de Wish boarding house, where she lives alongside other students preparing for university entrance exams. Once considered a child prodigy, she has since faced repeated failures on the University of Tokyo’s entrance examination. Despite this, she continues to pursue her academic goals. Kumi has a teasing personality and takes particular pleasure in frightening her new roommate Yurume Aida by sharing scary stories. Her appearance is distinguished by very long blonde hair and eyes that are typically drawn closed or not visible. She shares a friendly, if occasionally mischievous, rapport with the other housemates, including Sae Kawano and Matsukichi. While the series focuses on lighthearted everyday life, Kumi’s background suggests a character who has experienced both early promise and later setbacks, though her development remains within the comedic tone of the show.