The figure presents Koshimizu Sachiko in a poised, dynamic pose as one of her signature stage performances. The sculpt captures her refined facial features with a gentle smile, carefully painted eyes, and soft gradient shading on her hair. She wears an elaborate stage costume that blends frills and sharp lines, with a fitted bodice, pleated skirt, and ribbon accents, all reproduced with meticulous texture to convey fabric movement. Accessories may include a handheld prop and a stylized mic stand, while the pedestal base features a subtle theme from THE iDOLM@STER Cinderella Girls. The paintwork emphasizes contrast between light skin, vibrant outfit colors, and metallic highlights, giving the figure a sense of energy and presence on display. The overall presentation is faithful to the character’s idol persona, balancing elegance and energy.

In THE iDOLM@STER Cinderella Girls, Koshimizu Sachiko is one of the many aspiring idols striving to stand out in the bustling world of pop idols. Her plotline typically centers on dedication, growth, and teamwork as she trains, auditions, and performs with her fellow members. Sachiko is depicted as a composed, diligent performer whose ambition is tempered by kindness toward her peers. Across episodes and game content, she works to refine her stage presence, develop her unique persona, and connect with fans during live shows and events. The Cinderella Girls narrative emphasizes the personal challenges of balancing school life, friendships, and the rigors of training, while celebrating the joy of achieving a shared dream. This figure captures the character’s aura, dedication, and the sense of progression that fans associate with the franchise.