Kusuriuri, known as the Medicine Seller, is the enigmatic protagonist of the anime series 'Mononoke.' He travels across feudal Japan, exorcising malevolent spirits known as mononoke. With a mysterious past, Kusuriuri possesses deep knowledge of the supernatural and uses a unique sword that only activates when the Form, Truth, and Reason of the mononoke are revealed. His calm demeanor, cryptic speech, and striking appearance make him a compelling and iconic figure in the series.