I can only suggest that you read my post again.
I did not present any logic for why someone is a child due to their size.
I quite specifically said that she looks "relatively young". Relatively means in relation to the other girls.
I then said that, depsite this, her dialogue is not that of a child, so "she is obviously
not a child."
You somehow draw the conclusion that I'm saying she
is a child because she's small!??
How can you possibly arrive at this misconception?

I have no idea who the people you mention even are.