In Act I of Pygmalion, what does Shaw seem to think of Clara, and how does her manner contrast with that of The Flower Girl?

Clara is first introduced in in a voice of exasperation and
dominance ("What can Freddy be doing all this time?"). Then, in case there remains any
doubt as to her temperament, she confirms an ill-willed temperament and personality by being
judgemental and demandingly critical ("If Freddy had a bit of gumption, he would have got
one at the theatre door. ... Other people got cabs. Why couldn't he?"). Shaw makes it clear
from the outset that Clara is going to be...