As is punctuated by the last line in the video, the little one has a tendency to wander off occasionally, despite the fact that she lives in a hyper-dangerous world with a very strict mother.
As a result, Boy (Julian Edwards) is usually where Malorie knows he is, but she is forced to keep calling after her straying daughter.
If you haven’t seen Bird Box, you may be wondering why Malorie says “Girl” a lot more than “Boy,” and the answer is essentially linked to the behaviors of the character.