The point of the film is that she's 13 and shouldn't have to do that. The point of the film is that society forces young women to grow up and adultify themselves in various ways. Kara takes on that responsibility because she, as an adult, should be the one to handle it.
she kills him anyway & protects ruthye from suffering more trauma. but why is that the message?!? he murdered ruthye’s family in cold blood and literally trafficks little girls… just because she’s 13 doesn’t mean killing him won’t give her a sense of justice. it will.