Describe pearls personality and her behavior with other children in the scarlet letter?

Pearl stared intently at them, but she never tried to introduce herself. She would not reply if spoken to. And if the children gathered around her, as they sometimes did, Pearl would become absolutely terrifying in her puny wrath. She would pick up stones to throw at them and make incomprehensible shrieks that made her mother tremble because they sounded like the curses of some alien witch.