Saki is a professional model possessing a slender build and boyish atmosphere. She dresses in fashion calculated to appeal to men without seeming overtly deliberate. Though she verbalizes insecurities, she harbors deep self-love and keenly understands how to elicit perceptions of cuteness. Her colleague Tiara secretly holds romantic feelings for her, while Saki leads a promiscuous lifestyle and eschews committed relationships.

When Tiara visits a witch's shop wishing for Saki's modeling success, the unintended consequence amplifies Saki's self-centered traits. She transforms into a "Harem Seeker," perceiving Tiara's genuine concern as envy over her professional achievements. This escalates tensions to near-violent levels before the witch intervenes. The confrontation forces Saki into introspection, leading to regret over treating Tiara as a commodity. Saki later attempts to find the witch's shop, contemplating reversing the changes, but ultimately acknowledges her own role in their fractured dynamic and chooses to let Tiara pursue independence.

In the spin-off "Ruru's Episodes of Memories," Saki reappears, narrowly avoiding a traffic accident due to phone distraction. Ruru's intervention to save her sparks Ruru's personal growth. Saki's near-death experience suggests subsequent reflection on her carelessness.