Who is Lady Olivia Basildon from the play, An Ideal Husband?

Lady Basildon and her close friend Mrs. Marchmont are the first speakers in Wilde's play, setting the tone with their witty banter. "They are types," Wilde's stage notes say, "of exquisite fragility," and they are female dandies. Lady Basildon and her friend affect a world-weary attitude, pretending to find the fashionable London parties they go to terribly boring.