Ritsuko Akizuki serves as both an idol and manager at 765 Production. She began as an intern but shifted into an idol position because the agency faced a talent shortage and tight budget. Her managerial tasks encompass accounting, analyzing paperwork, and enforcing discipline among the idols. Her short-tempered, strict nature leads her to frequently scold others for laziness or unprofessionalism, earning her the unofficial title "Demon Drill Sergeant" as producer for the unit Ryuuguu Komachi.

She consistently wears glasses and neatly braided hair, declining to remove or alter them for performances or daily life, maintaining a professional image aligned with her focus on efficiency and business management. Her managerial approach emphasizes theoretical knowledge and logical planning, prioritizing organizational stability and fiscal responsibility; she initially objected to adopting stray Puchidols over budget and time concerns.

Beyond her stern work persona, Ritsuko enjoys gaming, collecting snack-packaged toys (shokugan), reading shoujo manga, and visiting zoos. She also reveals a hidden romantic side, occasionally displaying tsundere tendencies, particularly towards the Producer. Her Puchidol counterpart, Chicchan, mirrors her intelligence, managerial competence, and temperament; Chicchan solves complex math equations, handles financial documents, and exhibits a crush on the Producer.

Ritsuko struggles with self-confidence about her idol suitability, often comparing herself unfavorably to others and feeling embarrassed by her appearance without glasses. This self-doubt contrasts with her capable nature, extending to unexpected skills like mixed martial arts, demonstrated when she intervened in a kidnapping attempt. Her character development shows progression from balancing idol activities with high school studies to focusing more on production management while maintaining occasional idol duties.