Despite not being an ability user, he is known as one of the best detectives highly sought by the police, renowned by his comrades, himself, and others as the "greatest detective in the world". Ranpo is a young man with a fair complexion and short, messy black hair. His eyes, which are closed most of the time, are brown. His attire consists of a brown inverness cape that he wears over his shoulders and whose color matches both his hat and his pants. Under that, he wears a dark grey blazer.