Reigen is a tall man with dark brown eyes and short, reddish-blond hair with messy bangs. He is also very vibrant with his facial expressions ranging anywhere from attractive to terrifying, and he tends to sweat profusely. He is usually shown wearing a dark grey business suit with a pink or black tie. Reigen has few to no qualms about manipulating clients, enemies, allies, and even spirits to his own advantage. Reigen is a man guided by principles and is socially/emotionally smart.