Born the third daughter of Akechi Mitsuhide, she married Hosokawa Tadaoki. After her father killed Nobunaga in the Honnoji Incident of 1582, she was confined by her husband as the daughter of a rebel and forced to live under house arrest for several years. During this lonely period she encountered Christianity and received baptism through a lady-in-waiting, taking the baptismal name Gracia (Grace). Although Tadaoki disliked Christianity, her faith was unshakeable. On the eve of the Battle of Sekigahara in 1600, when Ishida Mitsunari attempted to take the families of pro-Tokugawa generals hostage, Gracia refused to allow herself to be captured by the enemy. Because Christian doctrine prohibited suicide, she ordered her chief retainer Ogasawara Shosai to kill her with a spear, after which the mansion was set ablaze. She was 37. News of her death reached Christians in Europe, where she was honored as a martyr who died for her faith.