A woman who is both an accomplished martial artist and physical education instructor at college. Her personality ranges from playful as a child to fearless as a fighter. After using a memory-erasing device, her multiple personalities were stored in a computer. Sorata, determined to save her, entered the machine himself. While searching for the Kakio family treasure, he discovered Hazuki in an emotionally fragmented and disconnected state, unable to interact with others. By earning her trust and vowing never to abandon her like her family had done, Sorata was on the verge of uncovering the truth behind the treasure. Despite her tendency to appear in unexpected places while wearing only a kinbaku, Hazuki is an intriguing character.