Bill (David Carradine). The twist of her daughter's survival changes everything, but that wasn't Tarantino's initial vision.
Tarantino originally conceptualized Kill Bill during the production of Pulp Fiction with Thurman in 1993. Thurman’s the Tarantino Universe.
While both living in New York in 2000-2001, Tarantino would often visit Thurman to develop and collaborate on Kill Bill’s script. Thurman’s first daughter, Maya Hawke, was an infant, so Tarantino spent a lot of time interacting with and observing the mother-daughter relationship. He revealed in an interview that he had originally planned for The Bride’s daughter to be dead, but was so affected by the warmth and bond between Thurman and her daughter that he realized it would be possible for The Bride’s daughter to be alive. Toward the end of writing the script, he adapted the ending to include Beatrix’s daughter as alive and well with Bill. It can be assumed that the original ending would have simply been the climactic confrontation and battle between Beatrix and Bill.
Tarantino revealed that had they begun writing and filming Kill Bill soon after Pulp Fiction, The Bride character would have been written to fit Thurman as a 22-year-old wanting revenge instead of a 30-year-old more mature mother. Tarantino stated that Thurman’s rhythm of speech and dynamic had adapted with motherhood, so he modified the character and screenplay to fit her new demeanor. Because he now understood the impact of a mother’s love and relationship with her child, Tarantino gave the film an added layer of satisfaction when Beatrix begins her new life with her daughter.
B.B. (Beatrix’s daughter) became such an interesting character in the latter half of Kill Bill Vol. 2 that it’s hard to imagine a version of the film without her. The five-year-old girl who watches kung-fu movies to fall asleep and curiously kills her goldfish seems to be about as Tarantino as a child can get. Once Upon a Time In Hollywood, and was the inspiration for the character’s fate.