Nana is a servant of the Kazahaya family, She is from a samurai family. Her father was about to reveal wrongdoings within the domain but had to commit ritual suicide for a crime he hadn't done. Ichinoshin tries to correct the wrongdoings, but end up being a target himself. After finding out her father's enemy is the man behind it all, Nana decides to protect Ichinoshin and his children, as she had promised Sachi, Ichinoshin's late wife.
Naotora Ii is a woman given a male name, who succeeded as the head of the Ii family during the Warring States period when her father passed away. With her wisdom, courage and affection for loved ones, Naotora lived through turbulent times and paved the way for the future of her clan.