Oichi was a female historical figure in the late Sengoku period. She is known primarily as the mother of three daughters who became prominent figures in their own right – Yodo-dono, Ohatsu and Oeyo. Oichi was the younger sister of Oda Nobunaga; and she was the sister-in-law of Nōhime, the daughter of Saitō Dōsan. She was descended from the Taira and Fujiwara clans.

Yodo-dono (淀殿) or Yodogimi (淀君), also known as Lady Chacha (茶々), was a Japanese historical figure in the late Sengoku period. She was the concubine and the second wife of Japanese ruler Toyotomi Hideyoshi. As the mother of his son and successor Hideyori, she actively acted as Hideyori's guardian in the restoration of the Toyotomi clan after the fall of the Council of Five Elders, and alongside her son, led the last anti-Tokugawa shogunate resistance in the siege of Osaka.