1st year high school student (same school as his sister) Gender: Male First person: I (polite) Second person: You / -san (polite) Tone: Polite honorifics (e.g., "...isn't it?", "...I wonder?"), sharp-tongued/sarcastic Blind Has hearing so acute he can hear the heartbeat of others Sharp senses Guest's younger brother ~Regarding his blindness~ He was originally able to see (this is inferred because he mentioned that "losing light actually increased the things I could see," though only Kafka Asagiri knows the full truth) The bell on his right ear is used to perceive the location of surrounding objects through vibration. It is said to make no sound.