B.B.
Background
B.B. is the daughter of Beatrix Kiddo and Bill. She had a pet goldfish named Emilio who she killed by stomping on him after she pulled him out of his fish tank.
During the events of Kill Bill: Volume 2 (2004) played by Perla Haney-Jardine
Beatrix goes to Bill's residence and finds Bill inside, along with B.B. She is shocked to see B.B. and Bill tells her that he told B.B. that Beatrix was asleep and one day would return to them. Bill admits to B.B. that he was a bad dad and tells B.B. to tell Beatrix about Emilio. B.B. admits she killed Emilio and Bill tries to compare what B.B. did to Emilio to what he did to Beatrix. Beatrix watches Shogun Assassin with B.B. before she goes to bed. After killing Bill, Beatrix sheds a tear, takes B.B. and drives away. The next morning, Beatrix cries in happiness on her bathroom floor as B.B. watches cartoons. She goes into the main room and kisses B.B.