Yumi serves as a prominent figure in the *Senran Kagura* franchise, appearing in multiple games and anime. Orphaned at eight when her parents died on a mission, she was approached at their funeral by her previously unknown grandfather, Kurokage. He offered training as a shinobi to uncover the truth behind their deaths. Accepting, she took the name "Yumi" and relocated to a remote mountain for rigorous training under his guidance. While initially driven by revenge, Kurokage taught her that power alone was insufficient. Hearing his life story, including his time as both loyal and rogue ninja, shifted Yumi's purpose; she dedicated herself to realizing his dream of a world without evil. Kurokage later formed the elite Gessen Girls' Academy shinobi squad with orphans Murakumo, Shiki, Yozakura, and Minori, placing Yumi as their leader. Yumi embodies calmness, seriousness, and a stubborn adherence to her ideals, specifically the "Justice of the Moon" – eliminating evil by any means to protect the vulnerable. Early on, she displayed hypocritical and judgmental tendencies, dismissing Asuka as unworthy of combat. However, her defeat by Asuka in *Shinovi Versus* prompted significant growth and a re-evaluation of her rigid views on good and evil. As a leader, she was strict, pushing teammates to excel while often neglecting their need for relaxation, though motivated by genuine care for their development. By *Estival Versus*, she adopted a more lenient approach, delegating discipline to Yozakura. She also cultivated a playful obsession with cuteness, adopting a lisp and baby-talk in localized media to embody this trait, which she equated with justice. Physically, Yumi has medium-length gray hair, icy blue eyes, and stands 167 cm tall. Her standard attire is a white furisode kimono with blue trim, worn off-the-shoulder to expose her chest, paired with white socks or lavender flip-flops, and a large white hair ribbon. Her "Ice Queen" transformation alters her appearance: her hair turns light blue and grows longer, her eyes become red, and she loses the ribbon. This form enhances her combat abilities and alters her outfit, featuring ice swords instead of fans in later depictions. Yumi's combat revolves around ice-based techniques. Trained by Kurokage, she mastered his signature "Black Ice," conjuring frigid lances to pierce and freeze opponents. Other techniques include "Ice Pillar Fan" (a whirlwind of icicles) and "Hyōsetsu no seiya" (an icy tornado). Her Ice Queen form amplifies these abilities, granting techniques like "Cataclysmic Blizzard of the Ice Queen," which risks her life for devastating damage. Post-revival in non-canonical media like *Senran Kagura: Passing on the Legends*, she developed ice magic, including "Hyõga" (freezing waves that shatter targets) and "Hitsurugi no nadare" (an avalanche of ice swords). Her development spans multiple titles. In *Shinovi Versus*, she clashed with Asuka over their conflicting ideals – Yumi's absolutist justice versus Asuka's belief in coexistence. Her defeat led her to acknowledge her flawed perspective. In *Shinovi Master*, facing the villain Fubuki, who mirrored her past self, and grappling with revelations about Kurokage's legacy, further refined her understanding of justice. Spin-offs like *Bon Appétit!* explore her comedic pursuit of cuteness. Non-canonical stories depict her sacrifice against "The Reaper," subsequent resurrection under his mind control, and eventual retirement as a shinobi.