Pearl is upset becuase the A is what she grew up to know her mother by. She grew up knowing her mother dressed modestly, with her hair pinned back, and the letter on her chest. However the minute Hester unpins her hair, and throws the "A" away, it makes Pearl highly uncomfortably and agitated. She, like all small children are slaves to familiarity. Hester is not her true mother without the A.
She felt relieved and happy, but as for her daughter, Pearl she did not like her without it.
Pearl
In Chapter 7 of "The Scarlet Letter," the children want to harm Hester and Pearl by throwing mud and flinging epithets at them. They view Hester and Pearl as outcasts because of Hester's scarlet letter and their sense of moral superiority.
Pearl demands that Hester throw away the scarlet letter and the sunshine by the brook because she associates the sunlight shining on her mother's bosom with the scarlet letter. Pearl wants to remove any connection between Hester and the symbol of her sin.
The scarlet letter means a lot to pearl. She thinks of it as a symbol of hate and unsecurity towards her mother. Also she does da cha cha like a sissy girl
They want Hester to reveal Pearl's father.
Realising that Pearl misses the scarlet letter, which Hester has always worn in her presence. Hester picks up the letter and pins in back on her dress. Pearl then crosses the brook and hugs her mother tightly.
After Pearl is born.
Hester is a very talented seamstress and uses that to support herself and Pearl
she saves it for her voyage with daughter Pearl
Hester was worried about Pearl's personality, because she is alot like Hester was when she was a child. She didn't want Pearl to turn out like she did, and be a wild person.
The fact that Hester would constantly remind Pearl of the consequences of sin is what convinced the governor to let Hester keep Pearl. Hester supported herself and Pearl by sewing garments.