Rui Akikaze, a first-year Performance Department student at Rinmeikan Girls School, trained in kendo and stage combat under her grandparents—her grandmother an award-winning fight scene actress. This foundation grants her physical prowess yet contrasts with her initial kendo examination struggles due to nervousness.

She discovered acting in junior high after witnessing Tamao Tomoe's performance, joining the drama club despite stage fright and social anxiety. Tamao's mentorship helped Rui manage these challenges. After Tamao graduated to Rinmeikan, Rui led the junior high drama club before following her.

Rui exhibits intense dedication toward those she admires, particularly Tamao. Initially, this devotion manifests as imitation of Tamao's acting style and near-exclusive focus on supporting her, often at the expense of her individuality or awareness of others. Early interactions reveal reluctance to assert artistic choices and adherence to age-based hierarchies, leading her to underestimate her capabilities.

Her development involves overcoming these limitations. Encouraged by peers like Yuyuko Tanaka—who self-appoints as Rui's "producer"—and Fumi Yumeoji, Rui explores her identity as a performer independent of Tamao. This growth shows in increased assertiveness during rehearsals, willingness to challenge script interpretations, and proactive support for Tamao during difficult times. A pivotal moment occurs in the "Revue of Salvation and Rebirth," where Rui confronts Tamao about their mutually detrimental dynamic, forging a healthier partnership.

Rui's relationships highlight key traits. Her admiration for Tamao includes romantic undertones, expressed through compliments, dreams, and a White Day confession attempt. She credits Tamao with helping her emerge from her shell and seeks to become her equal onstage. With Yuyuko, she shares a bond described as filling each other's shortcomings, though initial friction arose from Rui's single-minded focus on Tamao. Collaborative projects, like a safety demonstration with Karen Aijo, showcase Rui's meticulous preparation and willingness to voice creative concerns for the audience's benefit.

Her combat and performance style integrates kendo, wielding a dao sword named "Shooting Star." Revue outfits reflect traditional Japanese aesthetics with a forest-green kimono featuring tasuki ties and red camellia hair adornments. Personal preferences include enjoying donuts, disliking shiitake mushrooms and thunderstorms, and finding comfort in conversations with Tamao.