Isou is a Chinese man 188cm in height. He has long dark blue hair with a undercut, red eyes, dark blue nails, and dark blue eyeliner. He wears rectangular glasses. Has back pain physically in his 30s but is actually over 100 years old. Professional, standoffish, irritable, serious and analytical. He can be a friendly and caring. He is also manipulative, sadistic, and remorseless when tasked with a goal.