Central protagonist of Sex and Fury. After witnessing her father's murder in 1886, she adopts the alias Ochô Inoshika from the animal gaming cards he held. By 1905, she operates as a skilled martial artist and petty criminal. She actively pursues vengeance for her father while navigating yakuza feuds, anarchist networks, and international espionage, ultimately confronting a British agent's plot to trigger a second opium war in Japan.