Sakuya is a very powerful woman within the clan who has won the loyalties of many people, including Sanada Yukimura. She can predict the future, as she is a seer. Her brother, Shiina Nozumi, being a shaman, could see into a person's past. She had something to do with the outcome of the Battle of Sekigahara and the appearance/disappearance of Demon Eyes Kyo. Sakuya does not show any physical manifestations of power. It is clarified that she had always been in love with Kyoshiro, not Kyo, and remains in love with Kyoshiro while being worried over Kyo. Kyo is, however, seen as a dear friend to her and Kyoshiro. She is yet again, shown as the initial reason for the disagreement, and eventually the body stealing/soul swapping, between Kyo and Kyoshiro.