Saki, a young girl with cascading brown hair and warm brown eyes, dons a pink ensemble accented by a yellow sash embroidered with green leaf motifs, later exchanged for a purple sash during her travels. Initially frail and bedbound by an illness tied to her latent powers, her form transforms as her abilities awaken, radiating teal energy, her eyes shimmering azure, and a luminescent butterfly sigil manifesting near her chest. These powers, prophesied to oppose the Yami no Daimyō—a dark entity craving her energy—escalate rapidly, cementing her role as its destined adversary. Rescued in infancy from Abraham, a mutant priest, Saki was raised by Ichika in a life marked by pacifism and fragility. A mercenary assault triggers her psionic potential, sparking uncontrolled telekinetic surges: shattering a wooden sword, levitating to escape foes. These incidents catalyze her shift from helplessness to determined action, fueled by a blend of youthful idealism and emerging resolve. Journeying with Yasuke to seek Morisuke, a psychic mentor and healer, Saki clashes with Abraham, who aims to weaponize her gifts. She steadily masters her talents, outmaneuvering foes before toppling Abraham with Yasuke’s aid. Her powers later prove pivotal against the Yami no Daimyō. Encasing herself in a cocoon of energy, she emerges with ethereal butterfly wings, expelling the entity and reviving Yasuke from fatal wounds—an act that eradicates her ailment, liberating her from bodily constraints. Post-battle, she embraces a tranquil childhood with Ichiro’s family, retaining her abilities unburdened by sickness. Bonds with Yasuke strengthen through shared strife, symbolized by her returning Ichika’s pendant to him. Her arc weaves colossal power with ethical clarity, spurning corruption to uphold unity and sacrifice. Her capabilities span telekinesis, energy channeling, astral travel, and healing, underpinned by an "absolute psionic" physiology linking her to all lifeforms and enabling vast matter manipulation. Entwined with prophecy, she embodies dual roles: a fragile child and a transformative force within her world’s fate.