A female assassin from the film [[Kill Bill]], and former member of the DVAS. Born from a Japanese mother and a Chinese American father, after seeing her parents brutally murdered at the age of 9, O-Ren took violent revenge on their murderers just two years later and went on to become a professional assassin proficient in sword fighting.

Her attire after leaving the DVAS is a formal kimono, which she adopted after becoming the queen of the Yakuza in Tokyo, backed by [[Yuubari Gogo]], Johnny Mo, Sofie Fatale and her personal army known as the "Crazy 88."

Her weapon of choice is a [[shirasaya]] [[katana]].

Codename: "Cottonmouth"
ishii o-ren