Beatrix Kiddo’s daughter in Kill Bill: Volume 2 is named B.B.
The film reveals that B.B. is alive when Beatrix tracks Bill to his home in Mexico. Beatrix had believed that her unborn child died after Bill’s attack at the Two Pines wedding rehearsal, but she discovers that Bill has been raising their daughter, who is four years old.
B.B.’s appearance changes the emotional direction of the finale. Beatrix arrives intending to kill Bill, yet she must first confront the fact that her daughter knows Bill as her father. Their evening together briefly resembles an ordinary family reunion, even though it takes place in the shadow of the massacre and Beatrix’s revenge mission.
Viewers sometimes confuse B.B. with Vernita Green’s daughter Nikki, who appears in Volume 1, or with Sofie Fatale, O-Ren Ishii’s lawyer and associate. Those are separate characters. B.B. is played by Perla Haney-Jardine, while Beatrix is played by Uma Thurman.