How we cite our quotes:
[[Eliza] is not at all an attractive person. She is perhaps eighteen, perhaps twenty, hardly older. She wears a little sailor hat of black straw that has long been exposed to the dust and soot of London and has seldom if ever been brushed. Her hair needs washing rather badly: its mousy color can hardly be natural. She wears a shoddy black coat that reaches nearly to her knees and is shaped to her waist. She has a brown skirt with a coarse apron. Her boots are much the worse for wear. She is no doubt as clean as she can afford to be; but compared to the ladies she is very dirty. Her features are no worse than theirs; but their condition leaves something to be desired; and she needs the services of a dentist]. (1.29)
Shaw tells us that she "is not at all an attractive person," but he contradicts himself in the next act. In this case, mere physical appearance, dirtiness, and neglect destroy any kind of physical appeal.
The flower girl enters in state. She has a hat with three ostrich feathers, orange, sky-blue, and red. She has a nearly clean apron, and the shoddy coat has been tidied a little. The pathos of this deplorable figure, with its innocent vanity and consequential air, touches Pickering, who has already straightened himself in the presence of Mrs. Pearce. (2.21)
Even before she is taught to speak and talk correctly, Eliza has some ideas about cleanliness, self-image, and respectability. She is simply unable to meet any of the usual standards.
MRS. PEARCE. Yes, sir. Then might I ask you not to come down to breakfast in your dressing-gown, or at any rate not to use it as a napkin to the extent you do, sir. And if you would be so good as not to eat everything off the same plate, and to remember not to put the porridge saucepan out of your hand on the clean tablecloth, it would be a better example to the girl. You know you nearly choked yourself with a fishbone in the jam only last week. (2.188)
Mrs. Pearce has strong views on the potential harmfulness of what might be called bad behavior. As she sees it, Higgins must look and act respectable if he expects Eliza to change for the better.