Izumo no Okuni is the best informer in Japan. She adores Kyo obsessively, to the point that to be hated by him would make her happy. That said, she joined the Juunishinshou as Indara II, but she does not hesitate to sacrifice herself for Kyo. She then joins Kyo's team and assists Kyo in finding his real body. She knows many things about Kyo, Kyoshiro, and Sakuya, but she does not speak about them, merely hints at them. When the group separated she went to Kyoto. She finds Akira in Kyoto and offers him her own life in exchange for Kyo's real body; however, Akira doesn't kill her, instead sending Okuni to infiltrate the Mibu land to find information. Akira promises he will guard Kyo during that time.
In the Mibu arc she appeared shortly when she successfully infiltrated Mibu land. She was caught by Taihaku and engaged him in a short battle, during which she revealed her weapon, "Tekogen" (iron string). She was not victorious as, at a point in the battle, Taihaku told her to stop fighting. Taihaku then allowed her to escape. She then rejoins with the group, her body wounded, stating that Kyo's body is on Taishiro's hand. When the group split into four she advanced with Sasuke to fight against the Juunishinshou. She witnessed Sasuke fight his old friend, Makora (Kotaro), and the real Indara. After Makora brutal death by Indara, she cried and said that Makora once said to her that the creatures that Mibu Clan creates are like fireworks: even though they live a short life they fight hard as long as they can so that they can shine brightly. After the fight she once again left Sasuke to continue gathering information.
She had relatively minor role in Mibu arc. In the final battle she, as Yukimura asked her, led the large group of reinforcements, consisting of Tokugawa, Date and the Sanada army. Anri, Ieyasu Tokugawa and Nobuyuki Sanada also came to help.
