O-Ren Ishii

O-Ren Ishii is one of the main villains of the Kill Bill series. Code-named Cottonmouth, she is a half-Chinese, half-Japanese American woman who saw her parents brutally murdered at the age of nine years under the orders of a Yakuza boss, whom she kills two years later in an act of vengeance. She later becomes an expert assassin proficient in sniper marksmanship and sword fighting. Though once a member of the Deadly Vipers, she eventually became the head of the Tokyo Yakuza and possessed her own body-guard army, the Crazy 88 (see below). O-Ren is fiercely proud of her heritage, going so far as to kill her own subordinate when he vented his frustration over being led by "a half-breed Chinese-Jap-American bitch". There are several clues that she and the Bride were close friends before the massacre, such as their "silly rabbit" inside joke, the fact the Bride knew so much in great detail about her past before becoming an assassin, as well as O-Ren's apology and the Bride's tears at her death. The Bride also knows O-Ren's real name, before she learns the other names from Sofie Fatale. At the night of her death O-Ren visits a Japanese restaurant, together with some Crazy 88 members, Sofie Fatale and her own personal bodyguard, Gogo Yubari. While sitting in an apart room from the other guests, O-Ren hears a sound outside the room (made by the Bride). She throws a knife in that direction and orders Gogo to take a look. Gogo finds nothing (the Bride hides herself). Later on Sofie Fatale is captured by the Bride and taken to the main hall of the restaurant, where the Bride calls O-Ren. O-Ren appears, with her bodyguards, and the Bride reveals herself to O-Ren, cutting off Sofie's arm. The other guests run out of the restaurant. O-Ren sends some Crazy 88's to kill the Bride but the Bride kills them all. Then Gogo attacks the Bride, almost killing her. But the Bride kills Gogo in time. Then the rest of O-Ren's army arrives and O-Ren leaves the restaurant and goes to the garden. The Bride fights the Crazy 88's and defeats them all. Then the Bride goes to the garden, where she meets O-Ren. O-Ren challenges her and a sword fight begins. O-Ren gets the chance to kill the Bride, but underestimates her and gives her another chance. The Bride wounds O-Ren and the fight stops for a while. O-Ren apologizes herself for what she has done to the Bride and the Bride accepts that. Then the fight continues. The Bride defeats O-Ren by cutting the top of her head off. O-Ren dies, noticing that the Bride's sword was really made by Hattori Hanzo.