A young woman who worked as a Geisha who first appeared as Yakumo VII's mistress whom he met during WWII.
She became attracted to Kikuhiko due to his aloof personality and the two developed an on-again-off-again relationship. Eventually Kikuhiko rejected her and out of spite she began a relationship with Sukeroku which resulted in her becoming pregnant with their daughter, Konatsu. Sukeroku and Miyokichi eventually left for the countryside after Sukeroku's expulsion. However, she did not care for Sukeroku or Konatsu and instead turned to prostitution to earn money. After Kikuhiko appeared and rejected her advances again, she attempted suicide, but Sukeroku convinced her to stop. However, she slipped from a balcony and in his attempt to save her, both Miyokichi and Sukeroku fell to their deaths.
Wikipedia