Ichijiku, Chisato

九千怜

Ichijiku serves as the director of the research institute. His duties involve supervising "witches" and managing "Sorcerian." He assigns personnel to capture and recapture witches of A-rank or higher when they escape. His cold and merciless demeanor indicates that he places no value on human life. He treats every witch with extreme cruelty, viewing them merely as tools, and he hesitates not to execute any witch he deems unworthy of life.
It was later revealed that his motivation for joining the clandestine research institute was to find a way to revive his long-dead sister, Rena. He conducted his own experiments behind his superiors' backs, feeding some of his sister's brain tissue into Kotori's grane in the hope that his sister's memories would survive within Kotori. This attempt failed, but it did accelerate the hatching of the grane inside Kotori sooner than he had expected.