Okada manages Kanon Nakagawa’s career as an idol, guiding the rising star’s trajectory with pragmatic precision. After a concert, she notifies Kanon of an audition to cast a "little sister" figure for a TV project, underscoring Kanon’s surging appeal among younger audiences. Known for her no-nonsense demeanor, Okada counsels Kanon to prioritize rest and health, urging practical steps like post-performance showers.

When supernatural forces shrink Kanon into a child, Okada crosses paths with the diminutive idol but fails to recognize her. Noting the child’s uncanny likeness to Kanon, she assumes the girl is an audition candidate and dubs her "Maron," steering her through audition protocols while coordinating event logistics with methodical efficiency.

Amid chaos from a rogue spirit disrupting the audition, Okada remains steadfast in upholding professionalism, ensuring proceedings stay on track. Her appearance—glasses and hair coiled into neat buns—mirrors the polished demeanor expected of her managerial role.