The Girl with Brown Coat made her first, and presumably only appearance in "T.M.I.", where she was asked by Randy Marsh to explain "A man and a woman, what do they do to make a baby?", to which she replied, "They have sex?".
She has long, cherry blonde hair. She wears a white hair clip which has a design resembling cherries attached to it. She wears a brown jacket and pink pants.
She seems to be somewhat sexually knowledgeable, as showcased in "T.M.I.". She also seems to be very straightforward, even answering sexual questions in front of a whole class, without any timidness nor hesitation.