How we cite our quotes:
PICKERING. We're always talking Eliza.
HIGGINS. Teaching Eliza.
PICKERING. Dressing Eliza.
MRS. HIGGINS. What!
HIGGINS. Inventing new Elizas. (3.226-244)
Pickering and Higgins, caught up in the process of "inventing new Elizas," seem to have forgotten that she is a human being just as they are.
LIZA [pulling herself together in desperation] What am I fit for? What have you left me fit for? Where am I to go? What am I to do? What's to become of me? (4.60)
Having achieved her goal and won the bet, Eliza finds that her metamorphosis has left her confused. Having just "become" something new, she is already afraid of what will come next.
HIGGINS [with dignity, in his finest professional style] You have caused me to lose my temper: a thing that has hardly ever happened to me before. I prefer to say nothing more tonight. I am going to bed. (4.89)
Higgins, so used to being in control, is disappointed and frustrated to find himself losing hold of his emotions. He, the transformer, has become the transformed, if only momentarily.