Houko Byouinzaka

Acting as the professor's assistant and Yamane's older sister, this cold-hearted individual treats Iwai with total ruthlessness. To shield her sibling from the psychological trauma of killing, she serves as a surrogate target, enduring saline injections to mimic lethal strikes. This disturbing ritual has become so habitual that it triggers a twisted sense of arousal. Now a participant in the "Murderer's Game," she seeks the ultimate wish by helping hunt the Hair Queen.