Ranpo is a young man with a fair complexion and short, messy black hair. His eyes, which are closed most of the time, are green. He is often found bragging about his status as the greatest detective in the world. Ranpo is also shown to be rather childish, frequently teasing the others and sometimes refusing to do work or cases for trivial reasons such as laziness or spite. Ranpo has been shown to be unable to complete simple tasks such as riding a train or finding his way home.