The girl's name is Christie; Christie and Tina are both diminutives of Christina. This suggests that Talky Tina, in some supernatural way, acts upon the darker impulses of the little girl, who must hate her ill-tempered stepfather as much as the doll hates him. One can even imagine the girl, drunk with power after having triumphed over the stepfather, issuing a warning to her kindly mother, as the doll does in the last scene: "My name is Talky Tina, and you'd better be nice to me."
