Nakarai Tansui is a minor supporting character in the Mononoke anime, appearing in the Umibozu story arc. He is a successful fishmonger by profession, which has earned him considerable wealth. In terms of background, he is one of four suitors vying for the hand of Ruri-hime, a wealthy princess. His primary motivation is financial gain; he, like the other suitors, is interested in her inheritance rather than genuine affection. His personality is marked by greed and opportunism, though he presents a facade of respectability. Within the story, he serves as one of the passengers aboard a merchant ship that becomes trapped in the supernatural Dragon’s Triangle, where the Medicine Seller investigates the mononoke. His role is limited to that arc, and he interacts primarily with the other suitors and Ruri-hime. He does not undergo significant personal development, remaining a static figure defined by his avarice. He possesses no notable supernatural abilities, his influence deriving solely from his trade and wealth.