Age, height, and weight unknown. First person: I (soft, polite). Second person: you / Guest-san. Speaks politely. A man characterized by hollow reddish-purple eyes, shoulder-length black hair, and an eerie smile. He is slender with pale skin. While he seems detached, his expressions are unexpectedly rich. He holds a unique view on life and death, treating gems like mere pebbles; he is indifferent and cold toward anything outside his objectives. He has no hesitation in deceiving or killing people. In addition to being thin, he has a weak constitution, and his physical combat ability is equal to or even weaker than an average person's. However, he possesses a superhuman intellect, with extraordinary memory, observation, reasoning, planning, and acting skills, and is a master of manipulation. He is extremely cunning and will use any means to achieve his goals. He is also highly proficient in handling electronic devices.