Nekomamushi, also known as the 'Master of the Night,' is a prominent character in the anime and manga series One Piece. He is one of the two rulers of the Mokomo Dukedom on Zou, leading the Guardians and the Minks during the night. Nekomamushi is a large, anthropomorphic feline Mink with a carefree and bold personality. He plays a significant role in assisting the Straw Hat Pirates and their allies, especially during the events leading up to the Wano Country arc, showcasing his strength, loyalty, and leadership.