 When Shōka took Shokun away from the clan, he also brought Shusui, whom he brought into his care and sent to the palace.While Sa-Taihō believes that she is an assassin loyal to him, Shusui is actually a double agent under the orders of Advisor Sho, known as the Black Wolf and leader of an order of assassins known Wolves of the Wind which is loyal to the Emperor.In the second season of the anime, Shusui starts to hear sounds in her head; afraid that she is falling back into the control of the Hyōu clan, she attempts suicide.