Fumi Yumeoji is a second-year Performance Department student at Rinmeikan Girls School, having transferred from the prestigious Siegfeld Institute of Music. At Siegfeld, she was a top student and held the distinguished title of "Frau Jade." This transfer forms a significant part of her background.

She tends to care for others but consistently denies this trait and prefers flavoring her food with ponzu. Dedicated to her craft, Fumi seeks authenticity and depth in theatrical performances. She grapples with embodying "pure evil" as Duke Richelieu in *The Three Musketeers*, struggling to shed her inherent conscientiousness. Through sparring with Claudine Saijo, she learns performing a villain requires "resolve"—the willingness to confront and symbolically trample on others' beliefs.

Her relationships at Rinmeikan are central. Peers like Ichie Otonashi occasionally question her reasons for leaving Siegfeld, indicating lingering curiosity. Her commitment is evident through participation in group activities, such as ballet training with Tamao Tomoe, Rui Akikaze, and Ichie Otonashi.

As a Stage Girl, Fumi engages in Revue battles within an underground theater, wielding the Kingfisher Sword Breaker. Her involvement aligns with Stage Girls settling conflicts through theatrical combat.

Fumi's background includes a sister, Shiori Yumeoji, who attends Siegfeld. References to Shiori arise during Fumi's introspective moments exploring how perceived negative traits might affect familial perceptions.