Oboro

Oboro leads the Tensho School and is described as the strongest assassin in the Naraku organization. Trained in the Tensho School before succeeding its previous head, he fought Sakata Gintoki during the Amanto War but failed to kill him. He also possesses extensive knowledge of Yoshida Shouyou and Gintoki's past, while it is heavily implied that he was under Tokugawa Sadasada's orders to kill the remaining Joui Patriots.