Kimiko 公子 was one of the Yorozuya's first assignments, as she had gone missing and her father hired them so that the Shinsengumi wouldn't get involved and the whole thing would be handled more discreetly. This would lead to the Yorozuya's first meeting with the Harusame, members of which had taken Kimiko captive. The Yorozuya eventually defeated the Harusame members and rescued Kimiko.
Her skin is tan her hair is blonde and she wear dark yukata.
When the Yorozuya went to search for her in a club, Gin went to bathroom to cure his hangover. She didn't know about Gin not being involved in the drug trafficking so he begged him for her dose, with Gin of course not knowing what she is talking about. When she threatens that she will go to the police, the Harusame pirates appear and knock her out. She is later saved from Gin but they both fall fom a high window ending up unconscious. One of Katsura's men finds them and she is going under treatment until the end of the arc, when the Yorozuya successfully return her to her father.
- Because she looks like a pig, she is called "Hammy" by the Yorozuya and Gin made jokes about her having troubles with ham-processing machines.
- The first kanji on her name (公), looks like the katana ハム, which reads "hamu," the Japanese way of saying "Ham".